I was told this was going up on site at some point, so I organized the threat list, made all the Pokemon uniform in format, and made (to the best of my ability...) all of the entries consistent with the current gender policy. I'm not sure how many of these have been checked for grammar, but I saw enough mistakes to make me suggest it gets another one before it goes on site (if it actually is...).
Uber Threats:
Darkrai
Type: Dark
Base Stats: 70 HP/90 Atk/90 Def/135 SpA/90 SpD/125 Spe
Ability: Bad Dreams
A fearsome sweeper that can utilize Dark Void, a 80% accurate Sleep inducing move, to send even would-be counters a-snoozing, giving it ample time to make use of Nasty Plot to set up for a deadly sweep. Darkrai's superb Special Attack stat is nicely complemented by a large array of powerful attacks, including Dark Pulse, Thunder, Spacial Rend, Focus Blast, and Ice Beam. Darkrai can also surprise opponents with Swords Dance boosted Sucker Punches, Focus Punches, and Brick Breaks coming off of its decent Attack stat.
Deoxys-A
Type: Psychic
Base Stats: 50 HP/180 Atk/20 Def/180 SpA/20 SpD/150 Spe
Ability: Pressure
This Psychic-type Pokemon, despite having absolutely pitiful defensive stats, boasts the highest offensive stats of any Pokemon, and with access to moves such as Ice Beam, Shadow Ball, Thunder, Grass Knot, Superpower, ExtremeSpeed, Signal Beam, and the elemental punches Deoxys-A is capable of 2HKOing anything in the game at worst. Deoxys-A can also perform well as a suicide lead to get up Stealth Rock and/or Spikes quickly and efficiently, and it can also surprise enemy attackers with Counter or Mirror Coat.
Deoxys-D
Type: Psychic
Base Stats: 50 HP/70 Atk/160 Def/70 SpA/160 SpD/90 Spe
Ability: Pressure
The defensive counterpart of Deoxys-A. Despite having low HP, Deoxys-D's amazing Defense and Special Defense stats combined with reliable healing in Recover makes it an excellent general purpose tank as well as a counter to several top threats, such as Dragon Dance and Swords Dance Rayquaza as well as Mixed Dialga. Deoxys-D can use its defenses to shrug off hits while laying down Stealth Rock or Spikes, spreading around status with Toxic or Thunder Wave, or by using Seismic Toss and/or Night Shade to deal reliable damage to opponents while bypassing Deoxys-D's low offensive stats. Deoxys-D can also use Calm Mind to potentially cause a bit of damage to the opponent's team, with access to Ice Beam, Shadow Ball, Thunder, Grass Knot, and Signal Beam to give it wide type coverage to help make up for its low offensive stats. Deoxys-D can also use Taunt to stop set-up sweepers as well as Forretress and Wobbuffet, both of whom may try to set-up on it.
Deoxys-S
Type: Psychic
Base Stats: 50 HP/95 Atk/90 Def/95 SpA/90 SpD/180 Spe
Ability: Pressure
The fastest Pokemon in the game, Deoxys-S makes for a fantastic suicide lead. With access to both Stealth Rock and Spikes, it can use its tremendous Speed stat to possibly lay down multiple layers of entry hazards before going down. Deoxys-S also has the fastest Taunt in the game, which can easily shut down enemy supporters or set-up sweepers. If one should wish, Deoxys-S can use its great movepool (Identical to Deoxys-A's movepool) to function as an excellent revenge killer and late game cleaner.
Dialga
Type: Steel / Dragon
Base Stats: 100 HP/120 Atk/120 Def/150 SpA/100 SpD/90 Spe
Ability: Pressure
Dialga is one of the most threatening offensive forces in Ubers, as both of its attacking stats are very high and it has an extremely wide movepool to complement it. Dialga is most commonly seen as a special attacker backed by Life Orb, Choice Specs, or Choice Scarf, with its special movepool including Dragon Pulse, Draco Meteor, Fire Blast, Thunder, Earth Power, Aura Sphere, and Flash Cannon. Dialga also has access to physical moves such as Outrage, Earthquake, Shadow Claw, Dragon Claw, and Brick Break, allowing it to become a very threatening mixed attacker, or even a pure physical attacker when Bulk Up or a Choice Band is also in use. Dialga is no slouch defensively either. Its very good defensive stats combined with arguably the best defensive type combination in the game as well as access to supporting moves such as Stealth Rock, Thunder Wave, and Toxic allows Dialga to become an excellent supporting tank, despite Rest being its only form of recovery.
Garchomp
Type: Dragon / Ground
Base Stats: 108 HP/130 Atk/95 Def/80 SpA/85 SpD/102 Spe
Ability: Sand Veil
Garchomp has one of the best offensive type combinations in the game. The coverage provided by Garchomp's dual STABs is easily taken advantage of thanks to its high Attack and Speed stats. Swords Dance makes Garchomp into an extremely potent sweeper, with powerful attacks such as Dragon Claw, Outrage, Earthquake, Fire Fang, Stone Edge, Crunch, and Aqua Tail offering tons of power and great type coverage. Garchomp can also take advantage of a Choice Band to hit hard without needed set-up or a Choice Scarf to become a fast, deadly revenge killer.
Giratina
Type: Ghost / Dragon
Base Stats: 150 HP/100 Atk/120 Def/100 SpA/120 SpD/90 Spe
Ability: Pressure
Giratina's colossal defenses allow it to serve as a great wall and spinblocker. Despite Giratina's defenses being equal, it is generally seen as a physical wall thanks to access to Will-o-Wisp, allowing it to cripple the majority of physical attackers in Ubers. Most of Giratina's weaknesses also tend to come from special attacks, thus meaning that Giratina would struggle to wall the powerful special attacks of Ubers. Giratina can also hit hard with its decent offenses and STAB Dragon Claw, Dragon Pulse, Outrage, Shadow Claw, and/or Shadow Ball, and can even use Calm Mind to become a threatening set-up presence. Giratina can also surprise opponents with a Choice Band or Choice Specs set to hit hard with attacks such as Thunder, Earthquake, Shadow Force, Earth Power, Aura Sphere, and Stone Edge in addition to the other STAB moves mentioned previously.
Giratina-O
Type: Ghost / Dragon
Base Stats: 150 HP/120 Atk/100 Def/120 SpA/100 SpD/90 Spe
Ability: Pressure
Giratina's more offensive cousin, and perhaps the best offensive spinblocker in the game, Giratina-O boasts powerful Ghost- and Dragon-type STAB, which together hit a large portion of the Ubers tier for super effective damage. Three immunities, immunity to Trick and Knock Off, and incredible bulk allow Giratina-O to switch in rather easily, despite having weaknesses to some of the most common attack types in Ubers, with those types being Dragon, Ice, Ghost, and Dark. Giratina-O can make use of Calm Mind along with Dragon Pulse, Shadow Ball, Aura Sphere, Thunder, and Earth Power to hit very hard on special side, as well as Dragon Claw, Shadow Claw, Shadow Force, Stone Edge, and Earthquake to smash things of the physical end of the spectrum. High power attacks such as Draco Meteor and Outrage, combined with great attacking stats, also allow Giratina-O to be a powerful mixed attacker. In addition, Giratina-O is one of the few Ubers that gets a priority move: Shadow Sneak. With this move, Giratina-O can serve as a great check to Latias, Latios, Mewtwo, and Deoxys.
Groudon
Type: Ground
Base Stats: 100 HP/150 Atk/140 Def/100 SpA/90 SpD/90 Spe
Ability: Drought
Groudon's extremely good Attack and good defenses allow it to be one of the most threatening physical attackers in Ubers. Groudon learns powerful attacks such as Earthquake, Dragon Claw, Stone Edge, and Fire Punch that offer good type coverage as well, and when combined with a Choice Band, Swords Dance to boost Attack even more, or Rock Polish to make up for Groudon's below average Speed stat, the Continent Pokemon will certainly be very hard to stop. Groudon is also a popular recipient for Uber Baton Pass teams thanks to its sky-high Attack stat and its excellent type coverage. Groudon is also a very capable physical wall, making an excellent answer to threats such as Metagross, Garchomp, Rayquaza, Lucario, and most other physical sweepers thanks to its high Defense stat. Access to Toxic, Thunder Wave, Stealth Rock, and even Lave Plume to potentially spread burns allow Groudon to be an excellent supporter as well. Thanks to is ability, Drought, Groudon brings everlasting sunlight to the battle. This makes Groudon the bane of Rain teams as well as a massive boon to Ubers Sunny Day teams. Pokemon such as Heatran, Ho-Oh, Jumpluff, and Shiftry all become massive threats thanks to Groudon's sunlight.
Ho-Oh
Type: Fire / Flying
Base Stats: 106 HP/130 Atk/90 Def/110 SpA/154 SpD/90 Spe
Ability: Pressure
Ho-Oh's STAB attacks, Sacred Fire and Brave Bird, alone make it nearly impossible to wall, and when combined with other attacks such as Earthquake and Punishment, switching in anything will be a daunting prospect. That, combined with Ho-Oh's awesome Special Defense stat and Recover or Roost for reliable recovery, it can be very tough to take down if Stealth Rock is not up on Ho-Oh's side of the field. Ho-Oh, should you choose, can also try its hand at special attacking with Calm Mind, Fire Blast, Thunder, and Shadow Ball.
Kyogre
Type: Water
Base Stats: 100 HP/100 Atk/90 Def/150 SpA/140 SpD/90 Spe
Ability: Drizzle
The #1 used Pokemon in Ubers, and for good reason. Kyogre's fantastic Special Attack stat, combined with rain-fueled Water STAB (thanks to Drizzle) along with Ice Beam and Thunder for nearly unresisted coverage makes Kyogre incredibly hard to switch into. Kyogre can use Calm Mind to boost the power of its attacks even more, Choice Scarf to make up for its below average Speed stat, or Choice Specs to turn it into an instant offensive juggernaut. Choice Scarf and Choice Specs also allows Kyogre to abuse Water Spout, which reaches a jaw-dropping 337.5 base power when Kyogre is at 100% HP, factoring in STAB and the rain. Kyogre is also very strong defensively, as it can wall some of the top threats of Ubers such as Mewtwo, Darkrai, Groudon, some Rayquaza, some Garchomp, and some Ho-Oh when defensively EVed. Toxic and Thunder Wave also allows Kyogre to mess up many of its common counters, such as Latias and Palkia. The rain Kyogre provides, courtesy of Drizzle, allow fuels many dangerous threats such as Kingdra, Palkia, and Manaphy.
Latias
Type: Dragon / Psychic
Base Stats: 80 HP/80 Atk/90 Def/110 SpA/130 SpD/110 Spe
Ability: Levitate
Latias' success in Ubers is attributed to its special hold item: Soul Dew. This item boosts Latias' Special Attack and Special Defense stats to extremely high levels, allowing it to be a powerful sweeper with Calm Mind and STAB Dragon Pulse, Grass Knot, and Thunder. Latias also gets Wish, Toxic, Thunder Wave, Dual Screens, and Safeguard as support options, and when combined with reliable healing in Recover, Latias can be a sturdy special tank as well. Refresh in tandem with Calm Mind and Recover also allows Latias to get past some special walls, such as Blissey.
Latios
Type: Dragon / Psychic
Base Stats: 80 HP/90 Atk/80 Def/130 SpA/110 SpD/110 Spe
Ability: Levitate
Latios also gets to use Soul Dew, and it is essentially a frailer but stronger version of Latias. It gets many of the same attacks as Latias (although Latios usually uses Draco Meteor more than Latias), but Latios receives Memento and Dragon Dance in lieu of Wish. Dragon Dance allows Latios to use a mixed or physical set to surprise opponents, or simply for a Speed boost to outrun common Choice Scarf users. Memento gives Latios an advantage over Latias when using Dual Screens, as with it Latios can sacrifice itself to let a deadly sweeper come in for free and start to rampage through the opponent's team.
Lugia
Type: Psychic / Flying
Base Stats: 106 HP/90 Atk/130 Def/90 SpA/154 SpD/110 Spe
Ability: Pressure
Lugia is one of the sturdiest walls in the game, boasting incredible defensive stats as well as a wide supporting movepool. Lugia can easily wall things such as Groudon, Garchomp, Rayquaza, Metagross, and special attackers such as Dialga, Palkia, and some Giratina-O with ease while spreading around status in the form of Toxic and Thunder Wave. Lugia can also use Reflect and Light Screen to boost its impressive defenses even more, Whirlwind to shuffle the opponents team around while possibly spreading damage for entry hazards, and Recover or Roost to reliably heal itself. Lugia can also surprise opponents with Calm Mind along with attacks such as Ice Beam, Thunder, Earth Power, Aeroblast, and Dragon Pulse, turning it into an offensive threat. Lugia also gets Trick, allowing it to potentially cripple one of its counters by Tricking a Choice item onto the counter.
Manaphy
Type: Water
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Hydration
While Manaphy at first may seem to be outclassed by Kyogre and Palkia, Manaphy has a few advantages that should not be overlooked. Tail Glow allows Manaphy to set-up faster than both Kyogre and Palkia, and when combined with powerful attacks such as Surf, Ice Beam, Grass Knot, and Energy Ball, Manaphy can beat a strong offensive threat. Manaphy's ability, Hydration, allows it to shrug off status in the rain as well, meaning that it can use Rest to restore all of its HP and then wake up instantly thanks to Hydration, provided it is raining. Manaphy also has some interesting support options available to it, such as Toxic, Dual Screens, and U-turn for scouting the opponent's team. Manaphy isn't seen much, but it's not to be underestimated.
Mew
Type: Psychic
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Synchronize
Mew is one of the most versatile Pokemon in the game, but it is most commonly seen as a Baton Passer. The reason for this is that Mew can Baton Pass +2 of any stat, it gets Taunt to stop phasing attempts, and it can take a few its with s good defenses while setting up. All of this makes Mew the most threatening Baton Passer in the game, and a successful pass by Mew could make or break a game. In addition, Mew is an excellent supporter with access to Trick Room, Toxic, Thunder Wave, Will-o-Wisp, Hypnosis, Dual Screens, Stealth Rock, and U-turn for scouting purposes. Mew can also use its excellent offensive movepool, including Fire Blast, Thunder, Blizzard, Dark Pulse, Earthquake, Shadow Claw, Explosion, and much more in conjunction with Rock Polish, Swords Dance, and/or Nasty Plot to possibly sweep an enemy team, but generally Mew is outclassed as a sweeper by Mewtwo.
Mewtwo
Type: Psychic
Base Stats: 106 HP/110 Atk/90 Def/154 SpA/90 SpD/130 Spe
Ability: Pressure
Mewtwo main strength is in its versatility, as it excels as being a sweeper, supporter, and a wall. Mewtwo's prodigious Special Attack and Speed coupled with a wide array of attacks such as Calm Mind, Aura Sphere, Fire Blast, Thunder, Ice Beam, Shadow Ball, Grass Knot, and many more make Mewtwo a very frightening special sweeper. It can also take advantage of items such as Life Orb, Choice Specs, and Choice Scarf to boost its sweeping potential even more. Selfdestruct and Focus Punch let Mewtwo get around special walls as well, and its good Attack coupled with Bulk Up, Ice Punch, Brick Break, Earthquake, and Fire Punch let it sweep on the physical side too. Mewtwo can also be an excellent supporter with options such as Taunt, Recover, Reflect, Light Screen, Toxic, Will-O-Wisp, and Trick.
Palkia
Type: Water / Dragon
Base Stats: 90 HP/120 Atk/100 Def/150 SpA/120 SpD/100 Spe
Ability: Pressure
Palkia is known for having very good offense stats as well as being one of the few Pokemon not 2HKOed by a Water Spout from a Choice Specs Kyogre. Palkia's incredible Special Attack lets it use its special movepool, which includes Dragon Pulse, Spacial Rend, Draco Meteor, Fire Blast, Thunder, Earth Power, Aura Sphere, Surf, and Hydro Pump, to wrek havoc on its foes when using a Lustrous Orb, Choice Specs, or Choice Scarf. Palkia, like Dialga, also has access to physical moves such as Outrage, Aqua Tail, Earthquake, Shadow Claw, Dragon Claw, and Focus Punch, allowing it to become a very threatening physical or mixed sweeper.
Rayquaza
Type: Dragon / Flying
Base Stats: 105 HP/150 Atk/90 Def/150 SpA/90 SpD/95 Spe
Ability: Air Lock
Rayquaza is one of the most powerful offensive threats in Ubers. It boasts incredibly high offenses on both Attack and Special Attack, and these high stats will wreak utter devastation on an opponent's team when combined with high powered moves such as Draco Meteor, Outrage, Fire Blast, Overheat, Earthquake, ExtremeSpeed, and Brick Break. Rayquaza can also make use of Swords Dance and Dragon Dance alongside Life Orb to become an offensive juggernaut in just one turn, or it can just use Choice Band or Choice Specs to hit hard without having to set up. Air Lock, Rayquaza's unique ability, also makes it a very threatening presence to weather teams by nullifying the effects of rain, sunlight, and sandstorm.
Salamence
Type: Dragon/Flying
Base Stats: 95 HP/135 Atk/80 Def/110 SpA/80 SpD/100 Spe
Ability: Intimidate
Salamence at first glance may seem inferior to the much more powerful Rayquaza in the Ubers tier, but Salamence is actually one of the most effective partners for it. Since they have the same counters, Salamence can draw upon its wide movepool and its great Speed and offensive stats to either make holes for Rayquaza to sweep with mighty attacks such as Draco Meteor, Fire Blast, Outrage, and Earthquake. Alternatively, Salamence can let Rayquaza do the hole-punching and it can sweep itself with Dragon Dance. Salamence's base 100 Speed stat also means that Choice Scarf Palkia, perhaps the most common Dragon Dance Rayquaza check, cannot reliably revenge kill Salamence. Furthermore, Intimidate allows Salamence to check Swords Dance Lucario and Rayquaza in a pinch.
Shaymin-S
Type: Grass / Flying
Base Stats: 100 HP/103 Atk/75 Def/120 SpA/75 SpD/127 Spe
Ability: Serene Grace
Shaymin-S is well known for its Serene Grace ability, which boosts Air Slash to a 60% flinch rate and Seed Flare's chance of lowering the opponent's Special Defense by two stages to 80%. When combined with offensive coverage moves such as Earth Power, Hidden Power Fire, or Hidden Power Ice, Shaymin-S can be a menacing offensive threat with or without Choice Specs, Choice Scarf, or Life Orb. In addition, Shaymin-S is also the fastest user of the Substitute and Leech Seed combo, allowing it to stall out many Pokemon while keeping itself at optimal health.
Wobbuffet
Type: Psychic
Base Stats: 190 HP/33 Atk/58 Def/33 SpA/58 SpD/33 Spe
Ability: Shadow Tag
Although Wobbuffet's stats are bad in everything sans HP and it learns a grand total of 8 moves, it is much more threatening then it looks. Wobbuffet's unique ability, Shadow Tag, allows it to trap any Pokemon in the battle except another Wobbuffet. When combined with Counter, Mirror Coat, and Encore, Wobbuffet will all but ensure death on at least one of your opponent's Pokemon. Safeguard combined with the aforementioned Encore also allows deadly sweepers on Wobbuffet's team to come in and set up free of status and/or a super effective counter attack. Tickle, although rare, allows Wobbuffet to devastate enemy walls when paired with a strong user of Pursuit.
Non-Uber threats:
Abomasnow
Type: Ice / Grass
Base Stats: 90 HP/92 Atk/75 Def/92 SpA/85 SpD/60 Spe
Ability: Snow Warning
Abomasnow is unique due to the fact that it is the only competitively viable Pokemon in the game to summon permanent hail upon entering the battle. Abomasnow can use this ability to foil the opponent’s weather-related strategies, and give itself and its team access to a 100% accurate Blizzard, which hits a lot of Ubers for super effective damage. Abomasnow can also use a Choice Scarf to patch up its mediocre Speed, and use moves like Blizzard, Wood Hammer, Grass Knot, Focus Blast, and Ice Shard for coverage. It can also use the SubSeed strategy, in conjunction with hail, to great effect.
Blissey
Type: Normal
Base Stats: 255 HP/10 Atk/10 Def/75 SpA/135 SpD/55 Spe
Ability: Natural Cure / Serene Grace
The premier special wall in OU returns as the premier special wall in Ubers. Blissey's amazing HP and Special Defense means that it can handle any special attack (save full powered Water Spouts from Choice Specs Kyogre) without a second thought. Although pathetic offensively, Blissey can simply use Toxic, Thunder Wave, and Seismic Toss to cripple and wear down most threats easily while keeping itself alive with Softboiled. Blissey is also a great team player, with access to Wish to help heal the team and Aromatherapy/Heal Bell to remove pesky status conditions. It has access to Stealth Rock too, but that is better left to other Pokemon. With all of these support options, it is easy to see why it is a main component in the foundation of Uber Stall. If the trainer feels like it, Blissey also can try its hand at sweeping with Calm Mind, Thunder, Ice Beam, and/or Flamethrower.
Bronzong
Type: Steel / Psychic
Base Stats: 67 HP/89 Atk/116 Def/79 SpA/116 SpD/33 Spe
Ability: Levitate / Heatproof
Bronzong's great defensive typing allows it to be a great anti-metagame Pokémon, walling many threats such as Giratina-O (beware of Hidden Power Fire while the sun is shining), Latias, Latios, Groudon, Garchomp, Lugia, and Shaymin-S with ease. Bronzong can easily make use of supporting moves such as Stealth Rock, Toxic, Trick Room, Reflect, and Light Screen to assist its teammates while taking hits and wearing down foes with a choice of Gyro Ball, Payback, and/or Earthquake. When Bronzong can do no more, it can make good use of Explosion to eliminate an opposing Pokémon from play, or simply to allow a free switch-in opportunity from a teammate. (Especially if Reflect and Light Screen are up.)
Celebi
Type: Grass / Psychic
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Natural Cure
Celebi’s unimpressive stats (by Uber standards) may decrease its viability, but its sturdy defenses and excellent utility movepool make it a good choice in Ubers. Celebi makes a great lead with access to moves like Stealth Rock, Thunder Wave and U-turn. Celebi can also be an effective attacker, with moves like Leaf Storm, Grass Knot, Earth Power, Nasty Plot, Swords Dance, and Shadow Ball. Celebi's vast movepool makes it more suited for a supporting role, however, with things like Recover, Light Screen, Reflect, Leech Seed, Trick Room, Baton Pass, Heal Bell, and Perish Song.
Cresselia
Type: Psychic
Base Stats: 120 HP/70 Atk/120 Def/75 SpA/130 SpD/85 Spe
Ability: Levitate
Cresselia often has to compete with Lugia for the role of physical wall, as they both counter similar things, but Lugia has better overall stats and a wider movepool. Cresselia, however, is not weak to Stealth Rock, Rock-, Ice-, or Electric-type attacks, often allowing it to wall threats such as Groudon more effectively. Although Cresselia has to use Moonlight or Rest for recovery, sunlight from Groudon pumps up moonlight to healing even more HP than moves such as Recover or Roost. Cresselia's great defenses allow it to make good use of moves such as Toxic, Thunder Wave, and Ice Beam to wear down many threats. It also gets Reflect and Light Screen to help itself take hits or to let its teammates set up for a devastating sweep, the latter of which is made easier by Lunar Dance, which allows Cresselia to sacrifice itself to get a battered teammate in fully recovered, allowing it to begin its rampage anew. Cresselia is also one of the few reliable users of Trick Room in Ubers, and is a good choice for a team based around that particular field effect.
Dugtrio
Type: Ground
Base Stats: 35 HP/80 Atk/50 Def/50 SpA/70 SpD/120 Spe
Ability: Arena Trap / Sand Veil
Dugtrio may seem like a poor choice in Ubers, but it has certain characteristics that give it a unique niche. First off, Dugtrio's Arena Trap ability allows it to prevent all Pokemon (bar Flying-types and Pokemon with the ability Levitate) from switching. Due to its Ground-typing, it can switch into attacks like Choice Scarf Kyogre’s Thunder, and KO the opponent. It can also be used to great affect alongside Wobbuffet; Wobbuffet can Encore a harmless move, and Dugtrio can switch in and finish off the Pokemon. Dugtrio commonly uses moves like Earthquake, Stone Edge, Night Slash, and Sucker Punch, as well as both Choice items.
Exeggutor
Type: Grass / Psychic
Base Stats: 95 HP/95 Atk/85 Def/125 SpA/65 SpD/55 Spe
Ability: Chlorophyll
Exeggutor boasts the strongest STAB Grass Knot in the game, which hits the heavy Pokemon of Ubers for massive damage. Its mediocre defensive stats may not allow it to withstand attacks from the threatening sweepers of Ubers, but its ability, Chlorophyll, allows it to reach a monstrous Speed of 458 in the sun, allowing it to abuse its 125 Special Attack stat, as well as Sleep Powder. Exeggutor can also carry Explosion, letting it go out with a bang and eliminate a troublesome Pokemon.
Gengar
Type: Ghost / Poison
Base Stats: 60 HP/65 Atk/60 Def/130 SpA/75 SpD/110 Spe
Ability: Levitate
Gengar is a unique Pokemon in the Uber tier, sporting the ability easily check Rayquaza with its immunity to ExtremeSpeed and access to Icy Wind. Gengar also has powerful STAB Ghost attacks, which provide great coverage in Ubers. Great Special Attack and Speed, along with moves like Shadow Ball, Destiny Bond, Focus Blast, Pain Split, Thunder, Hypnosis, Trick, and Explosion, make Gengar a force to be reckoned with.
Heatran
Type: Fire / Steel
Base Stats: 91 HP/90 Atk/106 Def/130 SpA/106 SpD/77 Spe
Ability: Flash Fire
Heatran is an underrated Pokemon in Ubers. Thanks to its typing, Flash Fire, and decent 91/106/106 defenses, it can switch into many of the powerful offensive Dragon-types in Ubers thanks to being the only Pokemon in the game that resists the Dragon- + Fire-type attacking combination. Heatran is also commonly seen in the sun, which boosts its powerful STAB Fire-type attacks as well as leaving enemy Dragon-types such as Latias that rely on Thunder to beat some Steel-types helpless to hurt Heatran. Heatran can use Choice Scarf or Choice Specs with its great movepool (including moves such as Fire Blast, Flamethrower, Overheat, Dragon Pulse, Earth Power, Ancientpower, and Explosion) to become a great revenge killer or powerful hole-puncher. Heatran can also use Taunt, Roar, and Toxic to be a great stallbreaker with entry hazard support, and it is a fine user of Stealth Rock and Explosion.
Heracross
Type: Bug / Fighting
Base Stats: 80 HP/125 Atk/75 Def/40 SpA/95 SpD/85 Spe
Ability: Guts / Swarm
Heracross's has great dual STABs in the form of Close Combat and Megahorn. Coupled with its sky-high Attack and useful ability, Guts, Heracross can be very threatening in the Uber environment. Heracross can make use of moves like Stone Edge and Night Slash for coverage, and Sleep Talk to be able to switch into Darkrai's Dark Void and Sleep Talk a super effective hit onto it with a Guts boost. Heracross makes great use of Choice Band and Choice Scarf as well, the former being insanely powerful and surprisingly bulky with HP investment, while the latter allows it to outspeed almost everything bar Deoxys-S and other Scarf users. Heracross also makes good use of Vacuum Wave in a lead position to finish off Focus Sash Pokemon.
Infernape
Type: Fire / Fighting
Base Stats: 74 HP/104 Atk/71 Def/104 SpA/71 SpD/108 Spe
Ability: Blaze
Although Infernape’s poor defenses and average (by Uber standards) offenses may seem to limit its viability, Infernape can serve as a great lead and stallbreaker in Ubers. Infernape has several qualities that make it a good lead, such as access to powerful attacks like Fire Blast and Close Combat, and the ability to use Fake Out and Stealth Rock. Infernape may seem like a poor stallbreaker compared with the powerful mixed attackers in Ubers, but its immunity to Will-O-Wisp, access to STAB Close Combat to take care of Blissey, ability to use U-turn, and quick Speed make it a force to be reckoned with.
Jirachi
Type: Psychic / Steel
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Serene Grace
Jirachi is a great Pokemon in the Ubers tier by virtue of its Steel typing, 100 Stats across the board, and its amazing ability to support teams. Jirachi is one of the few viable users of Wish in Ubers, and it is easily able to pass them thanks to access to U-turn and Jirachi's many resistances. Jirachi can also provide status support via Thunder Wave and Toixc, and is also known for Serene Grace, which boosts Iron Head's flinch rate to 60%, which often allows Jirachi to often flinch foes to death without taking a single hit. Although Jirachi is weak offensively, its great typing, good Speed, and decent physical movepool (including attacks such as Iron Head, Fire Punch, and Ice Punch) allow it to become a great revenge killer with Choice Scarf. Jirachi can also make use of Trick to cripple an enemy Pokemon for the rest of the match.
Jumpluff
Type: Grass / Flying
Base Stats: 75 HP/55 Atk/70 Def/55 SpA/85 SpD/110 Spe
Ability: Chlorophyll / Leaf Guard
When looking at Jumpluff's stats and typing it doesn't seem that impressive, but don't underestimate it. Jumpluff's base 110 Speed allows it to outrun a good portion of the Ubers Metagame and Speed tie Lugia and the Lati Siblings. On top of that Jumpluff's ability Chlorophyll allows it to reach an incredible Speed of 700. Accompanying its Speed, Jumpluff also has access to Sleep Powder, Encore, and Leech Seed to make it particularly annoying. With Groudon's help, Jumpluff becomes the fastest SubSeeder in the game. Jumpluff is also immune to Ground moves and Spikes/Toxic Spikes, which is good because of its frailty. However it does take 25% damage from Stealth Rock.
Kabutops
Type: Rock / Water
Base Stats: 60 HP/115 Atk/105 Def/65 SpA/70 SpD/80 Spe
Ability: Battle Armor / Swift Swim
Kabutops is a great candidate for abusing Kyogre’s Drizzle ability. Under rain, its Swift Swim ability allows it to outspeed every Pokemon in the game (barring Deoxys-S and Choice Scarf users). Its base 115 Attack may not be that impressive by Uber standards, but it can quickly double it with the help of Swords Dance. In addition, Kabutops has moves like Low Kick, Stone Edge, Waterfall, and X-Scissor that give it excellent coverage. Under the rain, it can also make use of a Choice Band quite effectively. Kabutops may not seem like much, but under the rain, it poses a huge threat to most teams.
Kingdra
Type: Water / Dragon
Base Stats: 75 HP/95 Atk/95 Def/95 SpA/95 SpD/85 Spe
Ability: Swift Swim / Sniper
Although it may seem like Palkia outclasses Kingdra completely, there are still a few good reasons to use Kingdra instead. Kingdra makes good use of Swift Swim, which doubles its mediocre Speed stat in the rain, letting it outrun all non-choiced Pokémon in the Uber tier. Another advantage it has over Palkia is Dragon Dance, which turns Kingdra into a fearsome sweeper if left unchecked. Despite its offensive movepool being limited to its STAB moves (Waterfall, Surf, Hydro Pump, Draco Meteor, Dragon Pulse, and Outrage), it should be noted that Water and Dragon can hit everything in Ubers for neutral damage with the exception of Empoleon, which is rarely seen in Ubers. In addition to being a powerful physical sweeper, Kingdra has the ability to utilize an equally high Special Attack stat to run a mixed or special set. This makes Kingdra especially deadly, because it can rip through special or physical tanks.
Ludicolo
Type: Water / Grass
Stats: 80 HP/70 Atk/70 Def/90 SpA/100 SpD/70 Spe
Ability: Swift Swim / Rain Dish
Ludicolo may seem like an odd choice in Ubers, but it shines with rain support from Kyogre. In Ubers, Ludicolo can use moves like Leech Seed, Protect, and Substitute in tandem with its ability, Rain Dish, to stall out a large number of threats in the Uber metagame. Its Base 100 Special Defense helps it in this regard, allowing it to easily sponge a multitude of special attacks. Additionally, Ludicolo is one of the best Kyogre counters in the game, being able to switch into any of its attacks bar Choice Specs Thunder, and stall it out with Leech Seed and Protect. Ludicolo’s other ability, Swift Swim, doubles its Speed in rain, letting it serve as a satisfactory special sweeper.
Magnezone
Type: Steel / Electric
Base Stats: 70 HP/70 Atk/115 Def/130 SpA/90 SpD/60 Spe
Ability: Magnet Pull / Sturdy
Magnezone’s ability to trap and remove Steel-types with its Magnet Pull ability can be very valuable in Ubers. Magnezone also has a very big asset in its own Steel-typing, allowing it to switch into its many resistances, such as Dragon, Ghost, Ice, and Dark. Magnezone also has a good secondary typing, which gives it access to a powerful STAB Thunder. Magnezone can also utilize moves like Flash Cannon, Reflect, Light Screen, Magnet Rise, Mirror Coat, and Explosion to great effect. Magnezone often uses Choice Specs and Choice Scarf, to boost its power and speed, respectively.
Mamoswine
Type: Ice / Ground
Base Stats: 110 HP/130 Atk/80 Def/70 SpA/60 SpD/80 Spe
Ability: Oblivious / Snow Cloak
Mamoswine’s huge base 130 Attack, alongside powerful STAB Ice moves, allow it to easily take care of the omnipresent Dragons in Ubers. With access to moves like Stealth Rock, as well as priority in the form of Ice Shard, Mamoswine also has the ability to make a great lead. In addition to that, it can also use Endeavor in conjunction with Focus Sash to reduce opponents to 1 HP. Mamoswine also has the ability to pick off Dragons with its powerful Ice Shard. It also can don a Choice item for great effect, either making it very fast or obscenely powerful.
Metagross
Type: Psychic / Steel
Base Stats: 80 HP/135 Atk/130 Def/95 SpA/90 SDef/70 Spe
Ability: Clear Body
Metagross is an OU Pokemon, but it is still a big threat in the Ubers tier. Base 135 Attack is nothing to scoff at, especially when coupled by decent defenses and one of the best typings to have in the Ubers tier: Steel. Metagross's great defensive typing makes it a fine user of Stealth Rock. Metagross has an excellent movepool that includes very powerful attacks, such as Meteor Mash, Ice Punch, Earthquake, Thunder Punch, and Hammer Arm. It can also use Pursuit to trap troublesome foes such as Latias. Metagross also learns Explosion and Trick, which when used correctly will assuredly cripple one member of your opponent's team.
Ninjask
Type: Bug / Flying
Base Stats: 61 HP/90 Atk/45 Def/50 SpA/50 SpD/160 Spe
Ability: Speed Boost
With blazing Speed, Speed Boost, Baton Pass, and Swords Dance, Ninjask can serve as a great Baton Passer, even in the Uber environment. With access to Protect and Substitute, Ninjask is almost guaranteed to pass at least +2 Speed. Substitute can also be used to forcibly activate a pinch berry, giving Ninjask another boost to pass. Ninjask can also use Swords Dance in conjunction with a Focus Sash and Protect to always Pass a +2 boost to Speed and Attack, unless the opponent has a priority move. Due to its 4x Stealth Rock weakness, Ninjask is most often seen as a lead. Ninjask's STAB Bug attacks coming off of its passable 90 base Attack also discourages Psychic- and Dark-type users of Taunt.
Scizor
Type: Bug / Steel
Base Stats: 70 HP/130 Atk/100 Def/55 SpA/80 SpD/65 Spe
Ability: Technician / Swarm
Although Scizor is a top tier OU threat, its as though the metal bug was made for Ubers. It has STAB Bug-type attacks to do major damage against the large amounts of Psychic types in Ubers, and secondary Steel typing to help it sponge the Dragon-, Ice-, Dark-, and Ghost-type attacks commonly thrown around in the Ubers tier. Scizor's defensive capabilities are made even more potent by Kyogre's omnipresent rain, which lessens Scizor's lone weakness to Fire-type attacks, and Roost which allows Scizor to recover lost HP and keep switching in. U-turn makes Scizor a very effective scouter while dishing out hard hits to the common Psychic- and Dark-type Pokemon in Ubers, and it can also use Pursuit to put said Psychic-type Pokemon in a checkmate position. Scizor's Bullet Punch, boosted by STAB and Technician, is often used to pick off weakened enemy Pokemon and can even let Scizor sweep when combined with Swords Dance.
Shiftry
Type: Grass / Dark
Base Stats: 90 HP/100 Atk/60 Def/90 SpA/60 SpD/80 Spe
Ability: Chlorophyll / Early Bird
Shiftry has potenital to sweep entire teams, despite its rather low base stats. With access to Swords Dance and Nasty Plot, and Chlorophyll doubling its decent base 80 Speed in the sun, Shiftry should not be taken lightly. Its STAB Dark attacks allow it to hit the myriad of Psychic-types in Ubers with a super effective Dark Pulse or Sucker Punch. Shiftry also has the ability to use moves such as Grass Knot, Seed Bomb, Low Kick, Focus Blast, and Explosion to go out with a band once its usefulness is depleted.
Skarmory
Type: Steel / Flying
Base Stats: 65 HP/80 Atk/140 Def/40 SpA/70 SpD/70 Spe
Ability: Sturdy / Keen Eye
Skarmory is not seen too much in Ubers since it has to compete with Forretress for a team slot. Although Forretress is usually picked because of its ability to learn Rapid Spin, Toxic Spikes, and Payback, Skarmory has several notable advantages over the little steel bug and other physical walls. Skarmory has reliable recovery in Roost and a very good defensive typing, which grants it resistances to Dragon-, Grass-, Flying-, Ghost-, and Dark-type attacks, making it one of the best counters to Garchomp, Groudon, and Shaymin-S around. Using its good set of resistances, Skarmory can switch in on many foes while laying down Spikes and Stealth Rock. Skarmory also gets Whirlwind, allowing it to become a reliable phaser while spreading around entry hazard damage, and Taunt, meaning Forretress and Wobbuffet can't use Skarmory as set-up bait like they can with most other physical walls. Skarmory also has Toxic and Brave Bird in the form of direct damage dealing, although the latter is only really useful to stop Shaymin-S.
Tyranitar
Type: Rock / Dark
Base Stats: 100 HP/134 Atk/110 Def/95 SpA/100 SpD/61 Spe
Ability: Sand Stream
While Tyranitar may seem to be an unlikely choice for Ubers, seeing as it is weak to several common attacking type (Water, Grass, Fighting, and Ground), Tyranitar is still strong in the Uber tier. With 100/110/100 defenses and an Attack stat of 134, Tyranitar has Uber-esque stats with only its Speed dragging it down. One of the main perks of using Tyranitar is its ability to change the weather which ruins Thunder/Blizzard accuracy, stops the boosting of Fire of Water attacks, damages all non-Steel, Rock, or Ground types (which breaks Deoxys-S/A's Focus Sashes) and, on top of all this, gives Tyranitar a .5 Special Defense boost. Tyranitar also has access to key moves in the Uber tier, such as Stealth Rock, Dragon Dance, STAB Pursuit, STAB Crunch, STAB Stone Edge, Ice Punch, Earhquake, and Superpower. Along with it's great physical move pool, Tyranitar have a strong special movepool, such as Fire Blast, Flamethrower, Ice Beam, Thunder. All these factors allow Tyranitar to perform as a Trapper, Choice User, Mix Set Dancing Sweeper, or Lead and makes it very hard to predict.
Uxie
Type: Psychic
Base Stats: 75 HP/75 Atk/130 Def/75 SpA/130 SpD/95 Spe
Ability: Levitate
With a respectable 75 base HP stat and incredible 130 base defenses, Uxie is a bulky Pokemon even in the Uber tier. On top of those defenses, Uxie also has an above average base Speed for the Uber tier of 95, allowing it to outrun Ho-Oh, Kyogre, Groudon, Dialga, Palkia, and Giratina and can speed tie with Rayquaza. It also has immunity to Ground moves and Spikes/Toxic Spikes to help it switch in. While it's attacking stats and movepool leave much to be desired, Uxie's supporting movepool complements it's defenses and Speed. Uxie has access to a good range of Support moves such as Reflect, Light Screen, Memento, Yawn, Trick, and Stealth Rock. These give Uxie a myriad of options to choose from and use.
Weavile
Type: Dark / Ice
Base Stats: 70 HP/120 Atk/65 Def/40 SpA/85 SpD/125 Spe
Ability: Pressure
Weavile’s stellar dual STABs, Dark and Ice, work wonders in Ubers, an environment congested with Psychic-, Dragon-, and Flying-types. It also has Low Kick to hit Steel-types and all of the heavy Pokemon in Ubers. Weavile is also dangerous because of its blazing 125 base Speed, and on top of that, access to a priority move in the form Ice Shard and Fake Out, meaning almost nothing will escape an encounter with Weavile unharmed. Weavile can also make use of Swords Dance to boost its already high Attack, and makes a great user of Choice Band. In addition, Weavile can use Counter in conjunction with Focus Sash to kill powerful physical attackers.
Uber Threats:
Darkrai
Type: Dark
Base Stats: 70 HP/90 Atk/90 Def/135 SpA/90 SpD/125 Spe
Ability: Bad Dreams
A fearsome sweeper that can utilize Dark Void, a 80% accurate Sleep inducing move, to send even would-be counters a-snoozing, giving it ample time to make use of Nasty Plot to set up for a deadly sweep. Darkrai's superb Special Attack stat is nicely complemented by a large array of powerful attacks, including Dark Pulse, Thunder, Spacial Rend, Focus Blast, and Ice Beam. Darkrai can also surprise opponents with Swords Dance boosted Sucker Punches, Focus Punches, and Brick Breaks coming off of its decent Attack stat.
Deoxys-A
Type: Psychic
Base Stats: 50 HP/180 Atk/20 Def/180 SpA/20 SpD/150 Spe
Ability: Pressure
This Psychic-type Pokemon, despite having absolutely pitiful defensive stats, boasts the highest offensive stats of any Pokemon, and with access to moves such as Ice Beam, Shadow Ball, Thunder, Grass Knot, Superpower, ExtremeSpeed, Signal Beam, and the elemental punches Deoxys-A is capable of 2HKOing anything in the game at worst. Deoxys-A can also perform well as a suicide lead to get up Stealth Rock and/or Spikes quickly and efficiently, and it can also surprise enemy attackers with Counter or Mirror Coat.
Deoxys-D
Type: Psychic
Base Stats: 50 HP/70 Atk/160 Def/70 SpA/160 SpD/90 Spe
Ability: Pressure
The defensive counterpart of Deoxys-A. Despite having low HP, Deoxys-D's amazing Defense and Special Defense stats combined with reliable healing in Recover makes it an excellent general purpose tank as well as a counter to several top threats, such as Dragon Dance and Swords Dance Rayquaza as well as Mixed Dialga. Deoxys-D can use its defenses to shrug off hits while laying down Stealth Rock or Spikes, spreading around status with Toxic or Thunder Wave, or by using Seismic Toss and/or Night Shade to deal reliable damage to opponents while bypassing Deoxys-D's low offensive stats. Deoxys-D can also use Calm Mind to potentially cause a bit of damage to the opponent's team, with access to Ice Beam, Shadow Ball, Thunder, Grass Knot, and Signal Beam to give it wide type coverage to help make up for its low offensive stats. Deoxys-D can also use Taunt to stop set-up sweepers as well as Forretress and Wobbuffet, both of whom may try to set-up on it.
Deoxys-S
Type: Psychic
Base Stats: 50 HP/95 Atk/90 Def/95 SpA/90 SpD/180 Spe
Ability: Pressure
The fastest Pokemon in the game, Deoxys-S makes for a fantastic suicide lead. With access to both Stealth Rock and Spikes, it can use its tremendous Speed stat to possibly lay down multiple layers of entry hazards before going down. Deoxys-S also has the fastest Taunt in the game, which can easily shut down enemy supporters or set-up sweepers. If one should wish, Deoxys-S can use its great movepool (Identical to Deoxys-A's movepool) to function as an excellent revenge killer and late game cleaner.
Dialga
Type: Steel / Dragon
Base Stats: 100 HP/120 Atk/120 Def/150 SpA/100 SpD/90 Spe
Ability: Pressure
Dialga is one of the most threatening offensive forces in Ubers, as both of its attacking stats are very high and it has an extremely wide movepool to complement it. Dialga is most commonly seen as a special attacker backed by Life Orb, Choice Specs, or Choice Scarf, with its special movepool including Dragon Pulse, Draco Meteor, Fire Blast, Thunder, Earth Power, Aura Sphere, and Flash Cannon. Dialga also has access to physical moves such as Outrage, Earthquake, Shadow Claw, Dragon Claw, and Brick Break, allowing it to become a very threatening mixed attacker, or even a pure physical attacker when Bulk Up or a Choice Band is also in use. Dialga is no slouch defensively either. Its very good defensive stats combined with arguably the best defensive type combination in the game as well as access to supporting moves such as Stealth Rock, Thunder Wave, and Toxic allows Dialga to become an excellent supporting tank, despite Rest being its only form of recovery.
Garchomp
Type: Dragon / Ground
Base Stats: 108 HP/130 Atk/95 Def/80 SpA/85 SpD/102 Spe
Ability: Sand Veil
Garchomp has one of the best offensive type combinations in the game. The coverage provided by Garchomp's dual STABs is easily taken advantage of thanks to its high Attack and Speed stats. Swords Dance makes Garchomp into an extremely potent sweeper, with powerful attacks such as Dragon Claw, Outrage, Earthquake, Fire Fang, Stone Edge, Crunch, and Aqua Tail offering tons of power and great type coverage. Garchomp can also take advantage of a Choice Band to hit hard without needed set-up or a Choice Scarf to become a fast, deadly revenge killer.
Giratina
Type: Ghost / Dragon
Base Stats: 150 HP/100 Atk/120 Def/100 SpA/120 SpD/90 Spe
Ability: Pressure
Giratina's colossal defenses allow it to serve as a great wall and spinblocker. Despite Giratina's defenses being equal, it is generally seen as a physical wall thanks to access to Will-o-Wisp, allowing it to cripple the majority of physical attackers in Ubers. Most of Giratina's weaknesses also tend to come from special attacks, thus meaning that Giratina would struggle to wall the powerful special attacks of Ubers. Giratina can also hit hard with its decent offenses and STAB Dragon Claw, Dragon Pulse, Outrage, Shadow Claw, and/or Shadow Ball, and can even use Calm Mind to become a threatening set-up presence. Giratina can also surprise opponents with a Choice Band or Choice Specs set to hit hard with attacks such as Thunder, Earthquake, Shadow Force, Earth Power, Aura Sphere, and Stone Edge in addition to the other STAB moves mentioned previously.
Giratina-O
Type: Ghost / Dragon
Base Stats: 150 HP/120 Atk/100 Def/120 SpA/100 SpD/90 Spe
Ability: Pressure
Giratina's more offensive cousin, and perhaps the best offensive spinblocker in the game, Giratina-O boasts powerful Ghost- and Dragon-type STAB, which together hit a large portion of the Ubers tier for super effective damage. Three immunities, immunity to Trick and Knock Off, and incredible bulk allow Giratina-O to switch in rather easily, despite having weaknesses to some of the most common attack types in Ubers, with those types being Dragon, Ice, Ghost, and Dark. Giratina-O can make use of Calm Mind along with Dragon Pulse, Shadow Ball, Aura Sphere, Thunder, and Earth Power to hit very hard on special side, as well as Dragon Claw, Shadow Claw, Shadow Force, Stone Edge, and Earthquake to smash things of the physical end of the spectrum. High power attacks such as Draco Meteor and Outrage, combined with great attacking stats, also allow Giratina-O to be a powerful mixed attacker. In addition, Giratina-O is one of the few Ubers that gets a priority move: Shadow Sneak. With this move, Giratina-O can serve as a great check to Latias, Latios, Mewtwo, and Deoxys.
Groudon
Type: Ground
Base Stats: 100 HP/150 Atk/140 Def/100 SpA/90 SpD/90 Spe
Ability: Drought
Groudon's extremely good Attack and good defenses allow it to be one of the most threatening physical attackers in Ubers. Groudon learns powerful attacks such as Earthquake, Dragon Claw, Stone Edge, and Fire Punch that offer good type coverage as well, and when combined with a Choice Band, Swords Dance to boost Attack even more, or Rock Polish to make up for Groudon's below average Speed stat, the Continent Pokemon will certainly be very hard to stop. Groudon is also a popular recipient for Uber Baton Pass teams thanks to its sky-high Attack stat and its excellent type coverage. Groudon is also a very capable physical wall, making an excellent answer to threats such as Metagross, Garchomp, Rayquaza, Lucario, and most other physical sweepers thanks to its high Defense stat. Access to Toxic, Thunder Wave, Stealth Rock, and even Lave Plume to potentially spread burns allow Groudon to be an excellent supporter as well. Thanks to is ability, Drought, Groudon brings everlasting sunlight to the battle. This makes Groudon the bane of Rain teams as well as a massive boon to Ubers Sunny Day teams. Pokemon such as Heatran, Ho-Oh, Jumpluff, and Shiftry all become massive threats thanks to Groudon's sunlight.
Ho-Oh
Type: Fire / Flying
Base Stats: 106 HP/130 Atk/90 Def/110 SpA/154 SpD/90 Spe
Ability: Pressure
Ho-Oh's STAB attacks, Sacred Fire and Brave Bird, alone make it nearly impossible to wall, and when combined with other attacks such as Earthquake and Punishment, switching in anything will be a daunting prospect. That, combined with Ho-Oh's awesome Special Defense stat and Recover or Roost for reliable recovery, it can be very tough to take down if Stealth Rock is not up on Ho-Oh's side of the field. Ho-Oh, should you choose, can also try its hand at special attacking with Calm Mind, Fire Blast, Thunder, and Shadow Ball.
Kyogre
Type: Water
Base Stats: 100 HP/100 Atk/90 Def/150 SpA/140 SpD/90 Spe
Ability: Drizzle
The #1 used Pokemon in Ubers, and for good reason. Kyogre's fantastic Special Attack stat, combined with rain-fueled Water STAB (thanks to Drizzle) along with Ice Beam and Thunder for nearly unresisted coverage makes Kyogre incredibly hard to switch into. Kyogre can use Calm Mind to boost the power of its attacks even more, Choice Scarf to make up for its below average Speed stat, or Choice Specs to turn it into an instant offensive juggernaut. Choice Scarf and Choice Specs also allows Kyogre to abuse Water Spout, which reaches a jaw-dropping 337.5 base power when Kyogre is at 100% HP, factoring in STAB and the rain. Kyogre is also very strong defensively, as it can wall some of the top threats of Ubers such as Mewtwo, Darkrai, Groudon, some Rayquaza, some Garchomp, and some Ho-Oh when defensively EVed. Toxic and Thunder Wave also allows Kyogre to mess up many of its common counters, such as Latias and Palkia. The rain Kyogre provides, courtesy of Drizzle, allow fuels many dangerous threats such as Kingdra, Palkia, and Manaphy.
Latias
Type: Dragon / Psychic
Base Stats: 80 HP/80 Atk/90 Def/110 SpA/130 SpD/110 Spe
Ability: Levitate
Latias' success in Ubers is attributed to its special hold item: Soul Dew. This item boosts Latias' Special Attack and Special Defense stats to extremely high levels, allowing it to be a powerful sweeper with Calm Mind and STAB Dragon Pulse, Grass Knot, and Thunder. Latias also gets Wish, Toxic, Thunder Wave, Dual Screens, and Safeguard as support options, and when combined with reliable healing in Recover, Latias can be a sturdy special tank as well. Refresh in tandem with Calm Mind and Recover also allows Latias to get past some special walls, such as Blissey.
Latios
Type: Dragon / Psychic
Base Stats: 80 HP/90 Atk/80 Def/130 SpA/110 SpD/110 Spe
Ability: Levitate
Latios also gets to use Soul Dew, and it is essentially a frailer but stronger version of Latias. It gets many of the same attacks as Latias (although Latios usually uses Draco Meteor more than Latias), but Latios receives Memento and Dragon Dance in lieu of Wish. Dragon Dance allows Latios to use a mixed or physical set to surprise opponents, or simply for a Speed boost to outrun common Choice Scarf users. Memento gives Latios an advantage over Latias when using Dual Screens, as with it Latios can sacrifice itself to let a deadly sweeper come in for free and start to rampage through the opponent's team.
Lugia
Type: Psychic / Flying
Base Stats: 106 HP/90 Atk/130 Def/90 SpA/154 SpD/110 Spe
Ability: Pressure
Lugia is one of the sturdiest walls in the game, boasting incredible defensive stats as well as a wide supporting movepool. Lugia can easily wall things such as Groudon, Garchomp, Rayquaza, Metagross, and special attackers such as Dialga, Palkia, and some Giratina-O with ease while spreading around status in the form of Toxic and Thunder Wave. Lugia can also use Reflect and Light Screen to boost its impressive defenses even more, Whirlwind to shuffle the opponents team around while possibly spreading damage for entry hazards, and Recover or Roost to reliably heal itself. Lugia can also surprise opponents with Calm Mind along with attacks such as Ice Beam, Thunder, Earth Power, Aeroblast, and Dragon Pulse, turning it into an offensive threat. Lugia also gets Trick, allowing it to potentially cripple one of its counters by Tricking a Choice item onto the counter.
Manaphy
Type: Water
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Hydration
While Manaphy at first may seem to be outclassed by Kyogre and Palkia, Manaphy has a few advantages that should not be overlooked. Tail Glow allows Manaphy to set-up faster than both Kyogre and Palkia, and when combined with powerful attacks such as Surf, Ice Beam, Grass Knot, and Energy Ball, Manaphy can beat a strong offensive threat. Manaphy's ability, Hydration, allows it to shrug off status in the rain as well, meaning that it can use Rest to restore all of its HP and then wake up instantly thanks to Hydration, provided it is raining. Manaphy also has some interesting support options available to it, such as Toxic, Dual Screens, and U-turn for scouting the opponent's team. Manaphy isn't seen much, but it's not to be underestimated.
Mew
Type: Psychic
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Synchronize
Mew is one of the most versatile Pokemon in the game, but it is most commonly seen as a Baton Passer. The reason for this is that Mew can Baton Pass +2 of any stat, it gets Taunt to stop phasing attempts, and it can take a few its with s good defenses while setting up. All of this makes Mew the most threatening Baton Passer in the game, and a successful pass by Mew could make or break a game. In addition, Mew is an excellent supporter with access to Trick Room, Toxic, Thunder Wave, Will-o-Wisp, Hypnosis, Dual Screens, Stealth Rock, and U-turn for scouting purposes. Mew can also use its excellent offensive movepool, including Fire Blast, Thunder, Blizzard, Dark Pulse, Earthquake, Shadow Claw, Explosion, and much more in conjunction with Rock Polish, Swords Dance, and/or Nasty Plot to possibly sweep an enemy team, but generally Mew is outclassed as a sweeper by Mewtwo.
Mewtwo
Type: Psychic
Base Stats: 106 HP/110 Atk/90 Def/154 SpA/90 SpD/130 Spe
Ability: Pressure
Mewtwo main strength is in its versatility, as it excels as being a sweeper, supporter, and a wall. Mewtwo's prodigious Special Attack and Speed coupled with a wide array of attacks such as Calm Mind, Aura Sphere, Fire Blast, Thunder, Ice Beam, Shadow Ball, Grass Knot, and many more make Mewtwo a very frightening special sweeper. It can also take advantage of items such as Life Orb, Choice Specs, and Choice Scarf to boost its sweeping potential even more. Selfdestruct and Focus Punch let Mewtwo get around special walls as well, and its good Attack coupled with Bulk Up, Ice Punch, Brick Break, Earthquake, and Fire Punch let it sweep on the physical side too. Mewtwo can also be an excellent supporter with options such as Taunt, Recover, Reflect, Light Screen, Toxic, Will-O-Wisp, and Trick.
Palkia
Type: Water / Dragon
Base Stats: 90 HP/120 Atk/100 Def/150 SpA/120 SpD/100 Spe
Ability: Pressure
Palkia is known for having very good offense stats as well as being one of the few Pokemon not 2HKOed by a Water Spout from a Choice Specs Kyogre. Palkia's incredible Special Attack lets it use its special movepool, which includes Dragon Pulse, Spacial Rend, Draco Meteor, Fire Blast, Thunder, Earth Power, Aura Sphere, Surf, and Hydro Pump, to wrek havoc on its foes when using a Lustrous Orb, Choice Specs, or Choice Scarf. Palkia, like Dialga, also has access to physical moves such as Outrage, Aqua Tail, Earthquake, Shadow Claw, Dragon Claw, and Focus Punch, allowing it to become a very threatening physical or mixed sweeper.
Rayquaza
Type: Dragon / Flying
Base Stats: 105 HP/150 Atk/90 Def/150 SpA/90 SpD/95 Spe
Ability: Air Lock
Rayquaza is one of the most powerful offensive threats in Ubers. It boasts incredibly high offenses on both Attack and Special Attack, and these high stats will wreak utter devastation on an opponent's team when combined with high powered moves such as Draco Meteor, Outrage, Fire Blast, Overheat, Earthquake, ExtremeSpeed, and Brick Break. Rayquaza can also make use of Swords Dance and Dragon Dance alongside Life Orb to become an offensive juggernaut in just one turn, or it can just use Choice Band or Choice Specs to hit hard without having to set up. Air Lock, Rayquaza's unique ability, also makes it a very threatening presence to weather teams by nullifying the effects of rain, sunlight, and sandstorm.
Salamence
Type: Dragon/Flying
Base Stats: 95 HP/135 Atk/80 Def/110 SpA/80 SpD/100 Spe
Ability: Intimidate
Salamence at first glance may seem inferior to the much more powerful Rayquaza in the Ubers tier, but Salamence is actually one of the most effective partners for it. Since they have the same counters, Salamence can draw upon its wide movepool and its great Speed and offensive stats to either make holes for Rayquaza to sweep with mighty attacks such as Draco Meteor, Fire Blast, Outrage, and Earthquake. Alternatively, Salamence can let Rayquaza do the hole-punching and it can sweep itself with Dragon Dance. Salamence's base 100 Speed stat also means that Choice Scarf Palkia, perhaps the most common Dragon Dance Rayquaza check, cannot reliably revenge kill Salamence. Furthermore, Intimidate allows Salamence to check Swords Dance Lucario and Rayquaza in a pinch.
Shaymin-S
Type: Grass / Flying
Base Stats: 100 HP/103 Atk/75 Def/120 SpA/75 SpD/127 Spe
Ability: Serene Grace
Shaymin-S is well known for its Serene Grace ability, which boosts Air Slash to a 60% flinch rate and Seed Flare's chance of lowering the opponent's Special Defense by two stages to 80%. When combined with offensive coverage moves such as Earth Power, Hidden Power Fire, or Hidden Power Ice, Shaymin-S can be a menacing offensive threat with or without Choice Specs, Choice Scarf, or Life Orb. In addition, Shaymin-S is also the fastest user of the Substitute and Leech Seed combo, allowing it to stall out many Pokemon while keeping itself at optimal health.
Wobbuffet
Type: Psychic
Base Stats: 190 HP/33 Atk/58 Def/33 SpA/58 SpD/33 Spe
Ability: Shadow Tag
Although Wobbuffet's stats are bad in everything sans HP and it learns a grand total of 8 moves, it is much more threatening then it looks. Wobbuffet's unique ability, Shadow Tag, allows it to trap any Pokemon in the battle except another Wobbuffet. When combined with Counter, Mirror Coat, and Encore, Wobbuffet will all but ensure death on at least one of your opponent's Pokemon. Safeguard combined with the aforementioned Encore also allows deadly sweepers on Wobbuffet's team to come in and set up free of status and/or a super effective counter attack. Tickle, although rare, allows Wobbuffet to devastate enemy walls when paired with a strong user of Pursuit.
Non-Uber threats:
Abomasnow
Type: Ice / Grass
Base Stats: 90 HP/92 Atk/75 Def/92 SpA/85 SpD/60 Spe
Ability: Snow Warning
Abomasnow is unique due to the fact that it is the only competitively viable Pokemon in the game to summon permanent hail upon entering the battle. Abomasnow can use this ability to foil the opponent’s weather-related strategies, and give itself and its team access to a 100% accurate Blizzard, which hits a lot of Ubers for super effective damage. Abomasnow can also use a Choice Scarf to patch up its mediocre Speed, and use moves like Blizzard, Wood Hammer, Grass Knot, Focus Blast, and Ice Shard for coverage. It can also use the SubSeed strategy, in conjunction with hail, to great effect.
Blissey
Type: Normal
Base Stats: 255 HP/10 Atk/10 Def/75 SpA/135 SpD/55 Spe
Ability: Natural Cure / Serene Grace
The premier special wall in OU returns as the premier special wall in Ubers. Blissey's amazing HP and Special Defense means that it can handle any special attack (save full powered Water Spouts from Choice Specs Kyogre) without a second thought. Although pathetic offensively, Blissey can simply use Toxic, Thunder Wave, and Seismic Toss to cripple and wear down most threats easily while keeping itself alive with Softboiled. Blissey is also a great team player, with access to Wish to help heal the team and Aromatherapy/Heal Bell to remove pesky status conditions. It has access to Stealth Rock too, but that is better left to other Pokemon. With all of these support options, it is easy to see why it is a main component in the foundation of Uber Stall. If the trainer feels like it, Blissey also can try its hand at sweeping with Calm Mind, Thunder, Ice Beam, and/or Flamethrower.
Bronzong
Type: Steel / Psychic
Base Stats: 67 HP/89 Atk/116 Def/79 SpA/116 SpD/33 Spe
Ability: Levitate / Heatproof
Bronzong's great defensive typing allows it to be a great anti-metagame Pokémon, walling many threats such as Giratina-O (beware of Hidden Power Fire while the sun is shining), Latias, Latios, Groudon, Garchomp, Lugia, and Shaymin-S with ease. Bronzong can easily make use of supporting moves such as Stealth Rock, Toxic, Trick Room, Reflect, and Light Screen to assist its teammates while taking hits and wearing down foes with a choice of Gyro Ball, Payback, and/or Earthquake. When Bronzong can do no more, it can make good use of Explosion to eliminate an opposing Pokémon from play, or simply to allow a free switch-in opportunity from a teammate. (Especially if Reflect and Light Screen are up.)
Celebi
Type: Grass / Psychic
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Natural Cure
Celebi’s unimpressive stats (by Uber standards) may decrease its viability, but its sturdy defenses and excellent utility movepool make it a good choice in Ubers. Celebi makes a great lead with access to moves like Stealth Rock, Thunder Wave and U-turn. Celebi can also be an effective attacker, with moves like Leaf Storm, Grass Knot, Earth Power, Nasty Plot, Swords Dance, and Shadow Ball. Celebi's vast movepool makes it more suited for a supporting role, however, with things like Recover, Light Screen, Reflect, Leech Seed, Trick Room, Baton Pass, Heal Bell, and Perish Song.
Cresselia
Type: Psychic
Base Stats: 120 HP/70 Atk/120 Def/75 SpA/130 SpD/85 Spe
Ability: Levitate
Cresselia often has to compete with Lugia for the role of physical wall, as they both counter similar things, but Lugia has better overall stats and a wider movepool. Cresselia, however, is not weak to Stealth Rock, Rock-, Ice-, or Electric-type attacks, often allowing it to wall threats such as Groudon more effectively. Although Cresselia has to use Moonlight or Rest for recovery, sunlight from Groudon pumps up moonlight to healing even more HP than moves such as Recover or Roost. Cresselia's great defenses allow it to make good use of moves such as Toxic, Thunder Wave, and Ice Beam to wear down many threats. It also gets Reflect and Light Screen to help itself take hits or to let its teammates set up for a devastating sweep, the latter of which is made easier by Lunar Dance, which allows Cresselia to sacrifice itself to get a battered teammate in fully recovered, allowing it to begin its rampage anew. Cresselia is also one of the few reliable users of Trick Room in Ubers, and is a good choice for a team based around that particular field effect.
Dugtrio
Type: Ground
Base Stats: 35 HP/80 Atk/50 Def/50 SpA/70 SpD/120 Spe
Ability: Arena Trap / Sand Veil
Dugtrio may seem like a poor choice in Ubers, but it has certain characteristics that give it a unique niche. First off, Dugtrio's Arena Trap ability allows it to prevent all Pokemon (bar Flying-types and Pokemon with the ability Levitate) from switching. Due to its Ground-typing, it can switch into attacks like Choice Scarf Kyogre’s Thunder, and KO the opponent. It can also be used to great affect alongside Wobbuffet; Wobbuffet can Encore a harmless move, and Dugtrio can switch in and finish off the Pokemon. Dugtrio commonly uses moves like Earthquake, Stone Edge, Night Slash, and Sucker Punch, as well as both Choice items.
Exeggutor
Type: Grass / Psychic
Base Stats: 95 HP/95 Atk/85 Def/125 SpA/65 SpD/55 Spe
Ability: Chlorophyll
Exeggutor boasts the strongest STAB Grass Knot in the game, which hits the heavy Pokemon of Ubers for massive damage. Its mediocre defensive stats may not allow it to withstand attacks from the threatening sweepers of Ubers, but its ability, Chlorophyll, allows it to reach a monstrous Speed of 458 in the sun, allowing it to abuse its 125 Special Attack stat, as well as Sleep Powder. Exeggutor can also carry Explosion, letting it go out with a bang and eliminate a troublesome Pokemon.
Gengar
Type: Ghost / Poison
Base Stats: 60 HP/65 Atk/60 Def/130 SpA/75 SpD/110 Spe
Ability: Levitate
Gengar is a unique Pokemon in the Uber tier, sporting the ability easily check Rayquaza with its immunity to ExtremeSpeed and access to Icy Wind. Gengar also has powerful STAB Ghost attacks, which provide great coverage in Ubers. Great Special Attack and Speed, along with moves like Shadow Ball, Destiny Bond, Focus Blast, Pain Split, Thunder, Hypnosis, Trick, and Explosion, make Gengar a force to be reckoned with.
Heatran
Type: Fire / Steel
Base Stats: 91 HP/90 Atk/106 Def/130 SpA/106 SpD/77 Spe
Ability: Flash Fire
Heatran is an underrated Pokemon in Ubers. Thanks to its typing, Flash Fire, and decent 91/106/106 defenses, it can switch into many of the powerful offensive Dragon-types in Ubers thanks to being the only Pokemon in the game that resists the Dragon- + Fire-type attacking combination. Heatran is also commonly seen in the sun, which boosts its powerful STAB Fire-type attacks as well as leaving enemy Dragon-types such as Latias that rely on Thunder to beat some Steel-types helpless to hurt Heatran. Heatran can use Choice Scarf or Choice Specs with its great movepool (including moves such as Fire Blast, Flamethrower, Overheat, Dragon Pulse, Earth Power, Ancientpower, and Explosion) to become a great revenge killer or powerful hole-puncher. Heatran can also use Taunt, Roar, and Toxic to be a great stallbreaker with entry hazard support, and it is a fine user of Stealth Rock and Explosion.
Heracross
Type: Bug / Fighting
Base Stats: 80 HP/125 Atk/75 Def/40 SpA/95 SpD/85 Spe
Ability: Guts / Swarm
Heracross's has great dual STABs in the form of Close Combat and Megahorn. Coupled with its sky-high Attack and useful ability, Guts, Heracross can be very threatening in the Uber environment. Heracross can make use of moves like Stone Edge and Night Slash for coverage, and Sleep Talk to be able to switch into Darkrai's Dark Void and Sleep Talk a super effective hit onto it with a Guts boost. Heracross makes great use of Choice Band and Choice Scarf as well, the former being insanely powerful and surprisingly bulky with HP investment, while the latter allows it to outspeed almost everything bar Deoxys-S and other Scarf users. Heracross also makes good use of Vacuum Wave in a lead position to finish off Focus Sash Pokemon.
Infernape
Type: Fire / Fighting
Base Stats: 74 HP/104 Atk/71 Def/104 SpA/71 SpD/108 Spe
Ability: Blaze
Although Infernape’s poor defenses and average (by Uber standards) offenses may seem to limit its viability, Infernape can serve as a great lead and stallbreaker in Ubers. Infernape has several qualities that make it a good lead, such as access to powerful attacks like Fire Blast and Close Combat, and the ability to use Fake Out and Stealth Rock. Infernape may seem like a poor stallbreaker compared with the powerful mixed attackers in Ubers, but its immunity to Will-O-Wisp, access to STAB Close Combat to take care of Blissey, ability to use U-turn, and quick Speed make it a force to be reckoned with.
Jirachi
Type: Psychic / Steel
Base Stats: 100 HP/100 Atk/100 Def/100 SpA/100 SpD/100 Spe
Ability: Serene Grace
Jirachi is a great Pokemon in the Ubers tier by virtue of its Steel typing, 100 Stats across the board, and its amazing ability to support teams. Jirachi is one of the few viable users of Wish in Ubers, and it is easily able to pass them thanks to access to U-turn and Jirachi's many resistances. Jirachi can also provide status support via Thunder Wave and Toixc, and is also known for Serene Grace, which boosts Iron Head's flinch rate to 60%, which often allows Jirachi to often flinch foes to death without taking a single hit. Although Jirachi is weak offensively, its great typing, good Speed, and decent physical movepool (including attacks such as Iron Head, Fire Punch, and Ice Punch) allow it to become a great revenge killer with Choice Scarf. Jirachi can also make use of Trick to cripple an enemy Pokemon for the rest of the match.
Jumpluff
Type: Grass / Flying
Base Stats: 75 HP/55 Atk/70 Def/55 SpA/85 SpD/110 Spe
Ability: Chlorophyll / Leaf Guard
When looking at Jumpluff's stats and typing it doesn't seem that impressive, but don't underestimate it. Jumpluff's base 110 Speed allows it to outrun a good portion of the Ubers Metagame and Speed tie Lugia and the Lati Siblings. On top of that Jumpluff's ability Chlorophyll allows it to reach an incredible Speed of 700. Accompanying its Speed, Jumpluff also has access to Sleep Powder, Encore, and Leech Seed to make it particularly annoying. With Groudon's help, Jumpluff becomes the fastest SubSeeder in the game. Jumpluff is also immune to Ground moves and Spikes/Toxic Spikes, which is good because of its frailty. However it does take 25% damage from Stealth Rock.
Kabutops
Type: Rock / Water
Base Stats: 60 HP/115 Atk/105 Def/65 SpA/70 SpD/80 Spe
Ability: Battle Armor / Swift Swim
Kabutops is a great candidate for abusing Kyogre’s Drizzle ability. Under rain, its Swift Swim ability allows it to outspeed every Pokemon in the game (barring Deoxys-S and Choice Scarf users). Its base 115 Attack may not be that impressive by Uber standards, but it can quickly double it with the help of Swords Dance. In addition, Kabutops has moves like Low Kick, Stone Edge, Waterfall, and X-Scissor that give it excellent coverage. Under the rain, it can also make use of a Choice Band quite effectively. Kabutops may not seem like much, but under the rain, it poses a huge threat to most teams.
Kingdra
Type: Water / Dragon
Base Stats: 75 HP/95 Atk/95 Def/95 SpA/95 SpD/85 Spe
Ability: Swift Swim / Sniper
Although it may seem like Palkia outclasses Kingdra completely, there are still a few good reasons to use Kingdra instead. Kingdra makes good use of Swift Swim, which doubles its mediocre Speed stat in the rain, letting it outrun all non-choiced Pokémon in the Uber tier. Another advantage it has over Palkia is Dragon Dance, which turns Kingdra into a fearsome sweeper if left unchecked. Despite its offensive movepool being limited to its STAB moves (Waterfall, Surf, Hydro Pump, Draco Meteor, Dragon Pulse, and Outrage), it should be noted that Water and Dragon can hit everything in Ubers for neutral damage with the exception of Empoleon, which is rarely seen in Ubers. In addition to being a powerful physical sweeper, Kingdra has the ability to utilize an equally high Special Attack stat to run a mixed or special set. This makes Kingdra especially deadly, because it can rip through special or physical tanks.
Lucario
Type: Fighting/Steel
Base stats: 70 HP/110 Atk/70 Def/115 SpA/70 SpD/90 Spe
Abilities: Inner Focus/Steadfast
Type: Fighting/Steel
Base stats: 70 HP/110 Atk/70 Def/115 SpA/70 SpD/90 Spe
Abilities: Inner Focus/Steadfast
Lucario may not be seen as much as other sweepers, but it has fantastic resistances to Dark-, Ice-, and Dragon-type attacks, all of which are common attacking types in the Ubers metagame. Using those fantastic resistances, Lucario can set up Swords dances and prepare to sweep with its powerful Close Combat, and it even use its priority move Extremespeed to pick off faster foes. It also packs Crunch to tear apart any Ghost- and Psychic-Types who may be immune or resistant to its Fighting STAB. Lucario can also run an anti lead set that can defeat major leads such as Deoxys, Dialga, Tyranitar, Kyogre, Groudon (with Counter) and Rayquaza (with Ice Punch). Lucario can also run Agility to great success as it enables it to outspeed almost all of the tier with a single boost. It also allows it to replace ExtremeSpeed and use Ice Punch or Stone Edge for optimal coverage. Its defenses might be pathetic for the Ubers tier, but Lucario can still use its great resistances to survive. Underestimate this jackal at one's own peril.
Ludicolo
Type: Water / Grass
Stats: 80 HP/70 Atk/70 Def/90 SpA/100 SpD/70 Spe
Ability: Swift Swim / Rain Dish
Ludicolo may seem like an odd choice in Ubers, but it shines with rain support from Kyogre. In Ubers, Ludicolo can use moves like Leech Seed, Protect, and Substitute in tandem with its ability, Rain Dish, to stall out a large number of threats in the Uber metagame. Its Base 100 Special Defense helps it in this regard, allowing it to easily sponge a multitude of special attacks. Additionally, Ludicolo is one of the best Kyogre counters in the game, being able to switch into any of its attacks bar Choice Specs Thunder, and stall it out with Leech Seed and Protect. Ludicolo’s other ability, Swift Swim, doubles its Speed in rain, letting it serve as a satisfactory special sweeper.
Magnezone
Type: Steel / Electric
Base Stats: 70 HP/70 Atk/115 Def/130 SpA/90 SpD/60 Spe
Ability: Magnet Pull / Sturdy
Magnezone’s ability to trap and remove Steel-types with its Magnet Pull ability can be very valuable in Ubers. Magnezone also has a very big asset in its own Steel-typing, allowing it to switch into its many resistances, such as Dragon, Ghost, Ice, and Dark. Magnezone also has a good secondary typing, which gives it access to a powerful STAB Thunder. Magnezone can also utilize moves like Flash Cannon, Reflect, Light Screen, Magnet Rise, Mirror Coat, and Explosion to great effect. Magnezone often uses Choice Specs and Choice Scarf, to boost its power and speed, respectively.
Mamoswine
Type: Ice / Ground
Base Stats: 110 HP/130 Atk/80 Def/70 SpA/60 SpD/80 Spe
Ability: Oblivious / Snow Cloak
Mamoswine’s huge base 130 Attack, alongside powerful STAB Ice moves, allow it to easily take care of the omnipresent Dragons in Ubers. With access to moves like Stealth Rock, as well as priority in the form of Ice Shard, Mamoswine also has the ability to make a great lead. In addition to that, it can also use Endeavor in conjunction with Focus Sash to reduce opponents to 1 HP. Mamoswine also has the ability to pick off Dragons with its powerful Ice Shard. It also can don a Choice item for great effect, either making it very fast or obscenely powerful.
Metagross
Type: Psychic / Steel
Base Stats: 80 HP/135 Atk/130 Def/95 SpA/90 SDef/70 Spe
Ability: Clear Body
Metagross is an OU Pokemon, but it is still a big threat in the Ubers tier. Base 135 Attack is nothing to scoff at, especially when coupled by decent defenses and one of the best typings to have in the Ubers tier: Steel. Metagross's great defensive typing makes it a fine user of Stealth Rock. Metagross has an excellent movepool that includes very powerful attacks, such as Meteor Mash, Ice Punch, Earthquake, Thunder Punch, and Hammer Arm. It can also use Pursuit to trap troublesome foes such as Latias. Metagross also learns Explosion and Trick, which when used correctly will assuredly cripple one member of your opponent's team.
Ninjask
Type: Bug / Flying
Base Stats: 61 HP/90 Atk/45 Def/50 SpA/50 SpD/160 Spe
Ability: Speed Boost
With blazing Speed, Speed Boost, Baton Pass, and Swords Dance, Ninjask can serve as a great Baton Passer, even in the Uber environment. With access to Protect and Substitute, Ninjask is almost guaranteed to pass at least +2 Speed. Substitute can also be used to forcibly activate a pinch berry, giving Ninjask another boost to pass. Ninjask can also use Swords Dance in conjunction with a Focus Sash and Protect to always Pass a +2 boost to Speed and Attack, unless the opponent has a priority move. Due to its 4x Stealth Rock weakness, Ninjask is most often seen as a lead. Ninjask's STAB Bug attacks coming off of its passable 90 base Attack also discourages Psychic- and Dark-type users of Taunt.
Scizor
Type: Bug / Steel
Base Stats: 70 HP/130 Atk/100 Def/55 SpA/80 SpD/65 Spe
Ability: Technician / Swarm
Although Scizor is a top tier OU threat, its as though the metal bug was made for Ubers. It has STAB Bug-type attacks to do major damage against the large amounts of Psychic types in Ubers, and secondary Steel typing to help it sponge the Dragon-, Ice-, Dark-, and Ghost-type attacks commonly thrown around in the Ubers tier. Scizor's defensive capabilities are made even more potent by Kyogre's omnipresent rain, which lessens Scizor's lone weakness to Fire-type attacks, and Roost which allows Scizor to recover lost HP and keep switching in. U-turn makes Scizor a very effective scouter while dishing out hard hits to the common Psychic- and Dark-type Pokemon in Ubers, and it can also use Pursuit to put said Psychic-type Pokemon in a checkmate position. Scizor's Bullet Punch, boosted by STAB and Technician, is often used to pick off weakened enemy Pokemon and can even let Scizor sweep when combined with Swords Dance.
Shiftry
Type: Grass / Dark
Base Stats: 90 HP/100 Atk/60 Def/90 SpA/60 SpD/80 Spe
Ability: Chlorophyll / Early Bird
Shiftry has potenital to sweep entire teams, despite its rather low base stats. With access to Swords Dance and Nasty Plot, and Chlorophyll doubling its decent base 80 Speed in the sun, Shiftry should not be taken lightly. Its STAB Dark attacks allow it to hit the myriad of Psychic-types in Ubers with a super effective Dark Pulse or Sucker Punch. Shiftry also has the ability to use moves such as Grass Knot, Seed Bomb, Low Kick, Focus Blast, and Explosion to go out with a band once its usefulness is depleted.
Skarmory
Type: Steel / Flying
Base Stats: 65 HP/80 Atk/140 Def/40 SpA/70 SpD/70 Spe
Ability: Sturdy / Keen Eye
Skarmory is not seen too much in Ubers since it has to compete with Forretress for a team slot. Although Forretress is usually picked because of its ability to learn Rapid Spin, Toxic Spikes, and Payback, Skarmory has several notable advantages over the little steel bug and other physical walls. Skarmory has reliable recovery in Roost and a very good defensive typing, which grants it resistances to Dragon-, Grass-, Flying-, Ghost-, and Dark-type attacks, making it one of the best counters to Garchomp, Groudon, and Shaymin-S around. Using its good set of resistances, Skarmory can switch in on many foes while laying down Spikes and Stealth Rock. Skarmory also gets Whirlwind, allowing it to become a reliable phaser while spreading around entry hazard damage, and Taunt, meaning Forretress and Wobbuffet can't use Skarmory as set-up bait like they can with most other physical walls. Skarmory also has Toxic and Brave Bird in the form of direct damage dealing, although the latter is only really useful to stop Shaymin-S.
Tyranitar
Type: Rock / Dark
Base Stats: 100 HP/134 Atk/110 Def/95 SpA/100 SpD/61 Spe
Ability: Sand Stream
While Tyranitar may seem to be an unlikely choice for Ubers, seeing as it is weak to several common attacking type (Water, Grass, Fighting, and Ground), Tyranitar is still strong in the Uber tier. With 100/110/100 defenses and an Attack stat of 134, Tyranitar has Uber-esque stats with only its Speed dragging it down. One of the main perks of using Tyranitar is its ability to change the weather which ruins Thunder/Blizzard accuracy, stops the boosting of Fire of Water attacks, damages all non-Steel, Rock, or Ground types (which breaks Deoxys-S/A's Focus Sashes) and, on top of all this, gives Tyranitar a .5 Special Defense boost. Tyranitar also has access to key moves in the Uber tier, such as Stealth Rock, Dragon Dance, STAB Pursuit, STAB Crunch, STAB Stone Edge, Ice Punch, Earhquake, and Superpower. Along with it's great physical move pool, Tyranitar have a strong special movepool, such as Fire Blast, Flamethrower, Ice Beam, Thunder. All these factors allow Tyranitar to perform as a Trapper, Choice User, Mix Set Dancing Sweeper, or Lead and makes it very hard to predict.
Uxie
Type: Psychic
Base Stats: 75 HP/75 Atk/130 Def/75 SpA/130 SpD/95 Spe
Ability: Levitate
With a respectable 75 base HP stat and incredible 130 base defenses, Uxie is a bulky Pokemon even in the Uber tier. On top of those defenses, Uxie also has an above average base Speed for the Uber tier of 95, allowing it to outrun Ho-Oh, Kyogre, Groudon, Dialga, Palkia, and Giratina and can speed tie with Rayquaza. It also has immunity to Ground moves and Spikes/Toxic Spikes to help it switch in. While it's attacking stats and movepool leave much to be desired, Uxie's supporting movepool complements it's defenses and Speed. Uxie has access to a good range of Support moves such as Reflect, Light Screen, Memento, Yawn, Trick, and Stealth Rock. These give Uxie a myriad of options to choose from and use.
Weavile
Type: Dark / Ice
Base Stats: 70 HP/120 Atk/65 Def/40 SpA/85 SpD/125 Spe
Ability: Pressure
Weavile’s stellar dual STABs, Dark and Ice, work wonders in Ubers, an environment congested with Psychic-, Dragon-, and Flying-types. It also has Low Kick to hit Steel-types and all of the heavy Pokemon in Ubers. Weavile is also dangerous because of its blazing 125 base Speed, and on top of that, access to a priority move in the form Ice Shard and Fake Out, meaning almost nothing will escape an encounter with Weavile unharmed. Weavile can also make use of Swords Dance to boost its already high Attack, and makes a great user of Choice Band. In addition, Weavile can use Counter in conjunction with Focus Sash to kill powerful physical attackers.
