A few more things:
- Salamence isn't exactly a wallbreaker this gen. I'd personally call it a Sweeper / Revenge Killer / Cleaner, since the DD set is a great sweeper, while the Scarf set can allow it to revenge kill things as well as clean up late game.
- Scizor should have a Revenge Killer role slash as well, IMO.
Anyway, I'm not sure how quickly we want to put this article up, but there are a few Pokemon that could potentially be used in Ubers that we haven't got yet, mainly because their usefulness has only been discovered recently (although some of them are probably just forgotten):
Shiftry
Type: Grass / Dark
Base Stats: 90 HP / 100 Atk / 60 Def / 90 SpA / 60 SpD / 80 Spe
Ability: Chlorophyll / Early Bird / Pickpocket
Role: Sweeper
Chlorophyll has once again made a rather mediocre looking Pokemon viable in the harsh environment of Ubers. While Shiftry will inevitably be compared to Darkrai, the other Nasty Plotting Dark-type in the tier, who sports Dark Void and a lot more power, Shiftry avoids being outclassed due to its sheer Speed in the sun, as well as access to Grass Knot, which discourages Kyogre from switching in willy-nilly. Unlike Darkrai, Shiftry can revenge-kill Mewtwo when its sunny, not the other way around. With a simple moveset of Nasty Plot / Grass Knot / Dark Pulse / Focus Blast, Shiftry can easily rip through unprepared teams in the blink of an eye. However, it is extremely frail, making it difficult to set up without the aid of Wobbuffet.
Jynx
Type: Ice / Psychic
Base Stats: 65 HP / 50 Atk / 35 Def / 115 SpA / 95 SpD / 95 Spe
Ability: Oblivious / Forewarn / Dry Skin
Role: Sweeper / Stallbreaker
Jynx got a fun new toy in the fifth generation: Dry Skin. What would otherwise have just been another physically frail Psychic-type can now switch into the most powerful attack in the game, Kyogre's Water Spout. With her usable Special Defense, she can also take Ice Beams and Thunders that Kyogre use. What sets Jynx apart from other Water Absorbers is her offensive presence. Her decent base 115 Special Attack, coupled with Nasty Plot and Lovely Kiss, as well as the excellent Ice STAB, makes her extremely dangerous to the numerous rain stall teams in the Uber tier. Add the fact that she recovers 18.75% of her max HP every turn with Leftovers and Dry Skin (meaning she can almost make Substitutes for free), you have yourself a very nasty mono-attacker that can easily steamroll a team if she is given a free turn, a free turn which she can easily find. However, one must be aware of Jynx's flaws. Her miniscule base 35 Defense means a tiny prod will KO her, while her Stealth Rock weakness does not help her cause at all.
Latias
Type: Dragon / Psychic
Base Stats: 80 HP / 80 Atk / 90 Def / 110 SpA / 130 SpD / 110 Spe
Ability: Levitate
Role: Support / Sweeper
With the loss of Soul Dew in Generation 5, many doubted Latias' ability to be useful again in Ubers until she got her coveted treasure back. However, Latias has always been an extremely versatile Pokemon and has been able to adapt to this heavy blow. With a bulky spread, she can still switch into Kyogre's attacks, even though it is with much greater difficulty. The biggest catch of using Latias over other specialised Kyogre counters such as Grass Arceus and Palkia is her ability, Levitate. In a metagame where Spikes and Toxic Spikes are everywhere, and Rapid Spin is extremely hard to pull off, her immunity to these entry hazards allows her to switch in much more easily than her rivals. With Calm Mind, Recover and Psyshock, Latias can also defeat many Calm Mind users one on one, as Psyshock bypasses their boosted Special Defense. Latias can also run an effective Dual Screens set with Healing Wish, allowing many sweepers to have a much easier chance of setting up.
Latios
Type: Dragon / Psychic
Base Stats: 80 HP / 90 Atk / 80 Def / 130 SpA / 110 SpD / 110 Spe
Ability: Levitate
Role: Wallbreaker
Like Latias, the loss of Soul Dew hit Latios really hard. However, it is still an excellent Dual Screener in Ubers, being able to pull off Reflect and Light Screen with its good base 110 Speed and then giving its recipient a free switch with Memento. Latios is also able use its powerful base 130 SpA and Dragon-typing to pull off a Choice Specs set. While it may appear that other Uber dragons such as Dialga, Palkia and Reshiram are better for such a role due to their better typings and power, Latios still boasts being the fastest Pokemon to pull off a Choice Specs-boosted Draco Meteor. Its ability, Levitate, also allows it to ignore Spikes, a common entry hazard in the Uber metagame, meaning Latios can come in more frequently than the aforementioned dragons to dish out the pain. Finally, Latios has access to Trick and Psyshock, meaning Blissey and Chansey cannot switch into Latios as easily.
Lucario
Type: Fighting / Steel
Base Stats: 70 HP / 110 Atk / 70 Def / 115 SpA / 70 SpD / 90 Spe
Ability: Inner Focus / Steadfast / Justified
Role: Sweeper / Cleaner
Even though Generation 5 brought Lucario some new toys such as Nasty Plot and Hi Jump Kick, it still prefers to run its tried-and-true Swords Dance set. While its stats may seem subpar for Ubers, Lucario has the valuable Fighting-type STAB, strong priority as well as excellent resistances, which help it set up in the tier. With a Swords Dance under its belt and a few layers of hazards up, little can stand up to Lucario in the lategame. Its Swords Dance boosted Close Combat has a chance to OHKO support Groudon after three layers of Spikes, something which other Swords Dancing ExtremeSpeed users in Rayquaza and Arceus can only tip off their hats to. However, Lucario is extremely frail, and even with its defenses, it finds it difficult to set up, which is why the use of caution and Wobbuffet are highly recommended.
Hydreigon
Type: Dark / Dragon
Base Stats: 92 HP / 105 Atk / 90 Def / 125 SpA / 90 SpD / 98 Spe
Ability: Levitate
Role: Revenge Killer / Cleaner
Hydreigon's main claim to fame is his ability to revenge kill prominent threats in the Uber metagame while laughing at Wobbuffet, who is unable to trap and remove it with Mirror Coat due to Hydreigon's immunity. Couple that with Levitate to avoid Spikes and U-turn to scout, Hydreigon is an effective revenge killer in Ubers, able to strike down many prominent sweepers such as Dragon Dance Rayquaza, Mewtwo, Deoxys-A, and Darkrai. Hydreigon is not without its flaws however, as its Special Attack, while good, is often not good enough. Its base 98 Speed also misses a few targets, such as Choice Scarf Palkia and Dragon Dance Salamence, and its resistances could only be classified as below average at best.
Omastar
Type: Rock / Water
Base Stats: 70 HP / 60 Atk / 115 Def / 125 SpA / 70 SpD / 55 Spe
Ability: Swift Swim / Shell Armor / Weak Armor
Role: Revenge Killer / Cleaner
Omastar is another Pokemon whose career was changed by the addition of Shell Smash to its movepool. After a Shell Smash in the rain, it is virtually impossible to revenge kill, boasting an incredible 836 Speed. It is also incredibly powerful in the rain, easily doing over 80% to Ferrothorn with a +2 Hydro Pump. It also sports very good coverage, making it an extremely fearsome sweeper. Although it is hard to set up with Omastar, it is far from useless if it can't set up, either. As long as Kyogre keeps its end of the deal and keeps the rain up, Omastar can use its resistance to ExtremeSpeed and revenge kill ExtremeKiller Arceus with Hydro Pump, something very few Pokemon could claim to be able to do. Arceus is not the only Pokemon who Omastar can revenge kill, Mewtwo, Darkrai, and Shaymin-S are all as easily destroyed. Never underestimate the old fossil, lest it be your downfall.
Jirachi
Type: Steel / Psychic
Base Stats: 100 HP / 100 Atk / 100 Def / 100 SpA / 100 SpD / 100 Spe
Ability: Serene Grace
Role: Revenge Killer / Support
The other annoying but cute little pixie, Jirachi is not as versatile as it is in OU. However, it is an excellent revenge killer, sporting a good base 100 Speed and Steel-typing, allowing it revenge kill all variants of Rayquaza with no problems at all. Using a Choice Scarf, it outspeeds Dragon Dance Rayquaza and quickly puts it out of commission with Ice Punch. With access to Serene Grace and Iron Head, it could potentially turn a losing game into a winner with its trademark flinches, which would cause any opponent to tear their hairs out. Jirachi is also a good defensive pivot, using its Steel-typing to stomach powerful Dragon-type attacks and passing Wish around the team. It can even run a Dual Screens + Healing Wish set if you so desire.
Xatu
Type: Psychic / Flying
Base Stats: 65 HP / 75 Atk / 70 Def / 95 SpA / 70 SpD / 95 Spe
Ability: Synchronize / Early Bird / Magic Bounce
Role: Support
Xatu's sole job is to abuse its amazing ability, Magic Bounce. What would have otherwise been pretty horrible Pokemon, Xatu was given another chance in life by keeping entry hazards off the field. It can easily switch into hazard layers such as Ferrothorn and Forretress to bounce back their hazards. It can then set up Dual Screens for the team, allowing its teammates to set up easier. The prevention of entry hazards allow Stealth Rock weak Pokemon such as Ho-oh to terrorise the opponent more than it would have. Keep in mind, however, Xatu is still very frail and is KOed easily by stronger hazard layers such as Dialga, while it offers little to no offensive presence, which, on an offensive team, would suck up precious momentum.
Magnezone
Type: Electric / Steel
Base Stats: 70 HP / 70 Atk / 115 Def / 130 SpA / 90 SpD / 50 Spe
Ability: Magnet Pull / Sturdy / Analytic (unreleased)
Role: Support
Ferrothorn is one of the most annoying Pokemon to ever exist. There are many Pokemon that really enjoy its absence when it is removed. This is why Magnezone occasionally sees usage in the Uber tier. It can use its ability, Magnet Pull, along with Substitute and Charge Beam to set up on Ferrothorn, then remove it from the game forever and possibly take down even more Pokemon. With Ferrothorn and other Steel-types such as Forretress, Scizor, Jirachi, and Skarmory removed, the myriad of Dragon-types in Ubers can fire off Draco Meteors and Outrages with impunity, quickly decimating the opposition. Magnezone is not just a one-trick pony, either. Its decent bulk and many resistances allow it to fire off the most powerful Thunder in the game repeatedly, although its horrible Speed lets it down extremely badly. It can also set up Dual Screens for its teammates.
These Pokemon have all gotten Uber analyses, so they probably deserve descriptions, although I'm quite sure we've had enough work as it is. I'll try and write some up, I guess o_0.