Mega Aerodactyl
252 Atk / 4 Def / 252 Spe
Jolly Nature
- Max Atk for power, Max Spe to be as fast as possible
- Noticeable out-sped Spe benchmarks - Base 145, Base 135, +1 Base 81 and below
- Relevant Sets - All Out Attacker, Roost / 3 Attacks
Alakazam
4 Def / 252 SpA / 252 Spe
Timid Nature
- Max SpA for power, Max Spe to be as fast as possible
- Noticeable out-sped Spe benchmarks - Base 115, Base 110, (Insert specific mon if any)
- Relevant Sets - Life Orb, Focus Sash
Mega Alakazam
4 Def / 252 SpA / 252 Spe
Timid Nature
- Max SpA for power, Max Spe to be as fast as possible
- Noticeable out-sped Spe benchmarks - Base 145, Base 135, +1 Base 81 and below (429 and Below)
- Relevant Sets - All Out Attacker, Calm Mind
Mega-Altaria
252 Atk / 4 Def / 252 Spe
Jolly Nature
- Max Atk for power, Max Spe to be as fast as possible
- Noticeable out-sped Spe benchmarks - Base 78, Base 75, Base 70
- Noticeable out-sped benchmarks at +1 - Base 135, Base 125, Base 120
- Relevant Sets - Offensive Dragon Dance
248 HP / 136 Def / 96 SpD / 28 Spe
Impish Nature
- Noticeable Defensive benchmarks - WIP
- Relevant Sets - Defensive Dragon Dance (Heal Bell / Refresh / Cotton Guard w/ Facade)
The given EV spread along with an Impish nature optimizes Altaria's defenses and is ideal for setting up Dragon Dance. 28 Speed EVs are required to outrun Mega Lopunny and Manectric at +2, and to outrun maximum Speed Azumarill when unboosted. 248 HP / 136 Def / 96 SpD narrowly prevents KOs from some commonly feared, powerful attacks; for instance, Mega Altaria can't be 2HKOed by Choice Band Dragonite's Earthquake, Life Orb Thundurus's Hidden Power Ice, Mega Heracross's Rock Blast, and +1 Jolly Mega Charizard X's Flare Blitz, and it cannot be OHKOed by Jolly Mega Beedrill's Poison Jab and Azumarill's Play Rough. A spread of 248 HP / 184 Def / 76 Spe with a Jolly nature gives enough Speed to outrun maximum Speed Thundurus at +1, but it makes Mega Altaria significantly less bulky.
Specially Based Offensive Tank
248 HP / 168 SpA / 92 Spe
Modest / Timid Nature
WIP
The given EV spread prioritizes bulk, which is crucial for Mega Altaria to handle threats such as Mega Lopunny and Mega Charizard X, and special attacking power. The Speed EVs allow Altaria to outrun Jolly Azumarill; it is generally advised to invest a bit more in order to outspeed defensive Rotom-W and Landorus-T, which commonly run enough Speed to hit this benchmark. Depending on the team, more Speed can be run; some benchmarks include 240 for Adamant Bisharp (176 EVs) and even max Speed if outrunning Adamant Diggersby and slower base 100s is desired. Another option is 252 SpA / 4 Def / 252 Spe with a Timid nature, sacrificing bulk to outspeed certain key threats, including Jolly Mega Heracross, Jolly Bisharp, Adamant Excadrill, Adamant Lucario, and Timid Heatran, as well as tie with opposing base 80 Speed Pokemon such as opposing Altaria, Mamoswine, and non-Mega Gallade
Amoonguss
Pivot
248 HP / 168 Def / 92 SpD
Bold Nature
WIP - Provide
248 HP EVs reduce damage from entry hazards and maximize Amoonguss's overall bulk. 92 Special Defense EVs allow Amoonguss to avoid the 2HKO from Choice Specs Keldeo's Icy Wind, while the other EVs are poured into Defense with a Bold nature to better take on Pokemon such as Azumarill, Breloom, and Mega Lopunny. Regenerator allows Amoonguss to heal up upon switching out. Black Sludge is chosen to restore HP and is superior to Leftovers to punish Pokemon that wish to switch items with Trick. An alternate spread of 248 HP / 116 Def / 144 SpD with a Bold Nature can be used to avoid the 2HKO from Life Orb Thundurus's HP Ice with Stealth Rock up.
Azelf
Suicide Lead
228 Def / 28 SpA / 252 Spe
Naive Nature
228 Defense EVs allow Azelf to survive Fake Out + Return from Mega Lopunny 100% of the time barring critical hits. 28 Special Attack EVs gives Azelf a 50% chance to OHKO Naive Mega Diancie with Hidden Power Steel max Speed allows it to outrun everything up to Raikou and Starmie. If this is undesirable as single max attack and speed spread can be ran with Fire Blast to check Steel-types.
Azumarill
172 HP / 252 Atk / 84 Spe
Adamant Nature
- Max Atk for wall-breaking power
- 84 Spe to outpace non-invested Clefable and below - Support TTar, Chansey, Tangrowth, etc.
- Relevant Sets - Choice Band
92 HP / 252 Atk / 164 Spe (Room to boost speed)
Adamant
- Max Atk for power, 164 Spe for Base 70 Spe Pokemon
- 92 HP to activate Sitrus Berry
- Relevant Set - Belly Drum
- Other Option(s) - 12 HP / 244 Atk / 252 Spe Jolly to outrun non speed Rotom-W and below. 12 HP for Sitrus number.
Mega Beedrill
Revenge Killer
252 Atk / 4 Def / 252 Spe
Jolly Nature
A Jolly Nature and max Speed investment for as much speed as possible and to outrun base 135's such as Mega Lopunny and Manectric. Max Attack investment allows it to hit as hard as possible.
Bisharp
Swords Dance
252 Atk / 52 SpD / 204 Spe
Adamant / Jolly Nature
Maximum Attack and Speed investment is used to hit as hard and fast as possible, while a Jolly nature is preferred to outspeed key threats such as defensive Landorus-T and Rotom-W as well as Adamant Mega Altaria, Dragonite, Gyarados, and Diggersby. An Adamant nature can be used instead if this is unnecessary, as it gives Bisharp a noticeable power boost. For example, it ensures an OHKO on Choice Scarf Landorus-T after Stealth Rock damage, something that Jolly Bisharp cannot achieve. If this option is chosen, 52 EVs can be moved from Speed to Special Defense to avoid the OHKO from Life Orb Latios's Hidden Power Fire after Stealth Rock damage, which can help prevent Sucker Punch 50-50s.
Breloom
252 Atk / 4 SpD / 252 Spe
Adamant / Jolly Nature (Technician)
- Max Atk for power
- Noticeable out-sped benchmarks:
Utility
252 HP / 4 Atk / 252 SpD
Sassy Nature
Bronzong's special bulk is maximized because it needs all the special bulk it can get to reliably deal with threats such as Alakazam, Latios, and Mega Gardevoir. Physical attackers that rely on Ground + Rock / Ice coverage, such as Landorus-T, Garchomp, Excadrill, and Mamoswine, are walled even without Defense investment anyway, making Defense EVs unnecessary. 0 Speed IVs and a Speed-hindering nature are used to power up Gyro Ball.
Baton Pass
252 HP / 148 Def / 108 Spe
Bold / Impish Nature
The given EV spread with a Bold nature maximize Celebi's physical bulk to let it take hits from the likes of Azumarill and Mega Lopunny while outspeeding Jolly Bisharp in order to Baton Pass before it uses Pursuit. A specially defensive EV spread of 252 HP / 148 SpD / 108 Spe can be used to take hits better from the likes of Kingdra, Raikou, Latios, Latias, and Keldeo. If Substitute is chosen, a more specific EV spread of 252 HP / 104 Def / 44 SpD / 108 Spe with a Calm nature can be used to prevent Choice Specs Keldeo's Scald from breaking the Substitute. Note that an Impish nature should be used with Seed Bomb.
Support
252 HP / 156 Def / 84 SpD / 16 Spe
Bold Nature
The given EV spread and a Bold nature maximize Celebi's overall bulk, notably avoiding the 2HKO from Adamant Mega Lopunny's Return after Stealth Rock damage while outspeeding Adamant Bisharp to escape its Pursuit with Baton Pass or cripple it with Thunder Wave. A faster EV spread of 252 HP / 148 Def / 108 Spe can be used if Jolly Bisharp is an issue for your team. Using an EV spread of 252 HP / 144 Def / 96 SpD / 16 Spe gives Thundurus a significantly smaller chance to 2HKO Celebi with Life Orb-boosted Hidden Power Ice after Stealth Rock.
Chansey
Blob
4 HP / 252 Def / 252 SpD
Bold Nature
The given EVs maximize Chansey's physical and special bulk. Full investment in Special Defense maximizes Chansey's capabilities as a special wall, and a Bold nature is the best one to make Chansey as physically bulky as possible. Alternatively, you can use a spread of 252 HP / 252 Def / 4 SpD to truly maximize Chansey's physical bulk and to pass the largest Wishes possible to her teammates.
Mega Charizard-X
Dragon Dance
252 Atk / 4 SpD / 252 Spe
Jolly / Adamant Nature
Maximum speed and attack allows it to hit as hard and fast as possible. Alternatively, a bulkier spread of 144 HP / 252 Atk / 112 Spe can be ran. The EVs allow you to avoid being 2HKOed by Rotom-W's Hydro Pump. With 112 Spd you outspeed everything up to 88 Speed Jolly Landorus-T. Max Attack with Adamant to maximize your offensive power. At +2 you can outspeed every relevant Choice Scarf user.
Bulky Will-O-Wisp
248 HP / 148 SpD / 112 Spe
Careful Nature
The 248 HP EVs give you an odd HP number meaning you take a a little less from Stealth Rock, giving you more chances to switch in while Stealth Rock is up. 112 Spd outspeeds Adamant Gyarados, letting you burn it before it uses Earthquake. The remaining 148 EVs are placed into Special Defense to take Rotom-W's attacks a little better. These EVs can also be placed in Defense depending on the team. Alternatively running 16 Spd EVs is enough to outpace Adamant Bisharp and gives you more bulk in the defense of you choice.
Mega Charizard Y
Special Wallbreaker
4 Def / 252 SpA / 252 Spe
Timid / Modest Nature
This set is a simple special attacker, so maximized Special Attack and Speed are required to make it as fast and powerful as possible. A Timid nature is preferred to avoid being outsped by several key threats, especially positive-natured threats in the base 87-100 Speed range such as Excadrill, Mega Garchomp, Landorus-T, Kyurem-B, and Mega Charizard X. Mega Charizard Y also gains so much power in the sunlight that it doesn't really need the extra strength offered by Modest, though it can be used if your team can handle the Pokemon previously mentioned.
Defensive
252 HP / 252 Def / 4 SpD
Impish Nature
The EVs are standard for a physical tank such as Chesnaught: max Defense and HP to make it as physically bulky as possible. More Attack and Speed can be used for more offensive prowess, at the cost of some bulk.
Magic Guard
252 HP / 172 Def / 84 SpD
Calm Nature
The given Special Defense and HP investment along with a Calm nature allow Clefable to, most of the time, avoid the 2HKO from Mild Life Orb Kyurem-B's Ice Beam, Thundurus's Thunderbolt, Mega Diancie's Moonblast, and Mega Manectric's Thunderbolt. The given Defense and HP investment allow Clefable to avoid the 2HKO from Jolly Mega Lopunny's Return, Latios's Psyshock, and Jolly Mega Gyarados's Waterfall, as well as the OHKO from Choice Band Scizor's Bullet Punch.
Bulky Pivot
144 HP / 112 Atk / 252 Spe
Jolly nature
The 144 HP EVs allow Cobalion to survive an Earthquake from Excadrill and take it out with Close Combat while the Attack EVs ensure an OHKO on Mega Gardevoir with Iron Head and 2HKOs on Ferrothorn and specially defensive Heatran with Close Combat after Stealth Rock damage. Leftovers is chosen to keep Cobalion healthy as it switches into foes throughout the match. Alternatively, a simple offensive spread can be ran utilizing Substitute and Swords Dance.
Sheer Force Attacker
48 HP / 252 Atk / 208 Spe
Adamant Nature
The EVs are just enough to outspeed defensive Skarmory while maximizing power, however, if Skarmory and normal Scizor are not a concern, an alternative spread of 128 HP / 252 Atk / 128 Spe can be used for Clefable and 84 Spe Azumarill.
Assault Vest
252 Atk / 236 SpD / 20 Spe
Adamant Nature
An Adamant nature and maximum Attack investment allows Conkeldurr to hit hard with its great coverage. 20 Speed EVs allows it to outpace opposing Conkeldurr and Hippowdon, allowing Conkeldurr to potentially beat Hippowdon one-on-one if Guts is activated. The rest of the EVs are put in Special Defense to maximize bulk, allowing Conkeldurr to take hits from the aforementioned specially offensive threats
Wallbreaker
252 Atk / 4 SpD / 252 Spe
Jolly Nature
Adaptability is the reason why Crawdaunt is such a powerful and efficient wallbreaker, and it's what gives Crawdaunt its niche. 252 Speed EVs combined with a Jolly nature allow Crawdaunt to outspeed many common defensive Pokemon such as Rotom-W, defensive variants of Heatran and Landorus-T, and Mega Venusaur. An Adamant nature can also be used to hit harder, but Jolly is definitely preferred. Maximum Attack EVs increase Crawdaunt's damage output, making it harder to wall.
Specially Offensive
8 Atk / 248 SpA / 252 Spe
Naive Nature
To make full use of Mega Diancie's great Speed tier, full investment in Speed is necessary. 8 Attack EVs allows Mega Diancie to OHKO Mega Charizard X, while the rest is put in Special Attack for Mega Diancie to hit as hard as possible. Running an EV spread of 252 Atk / 4 SpA / 252 Spe with a Naive nature enables Mega Diancie to 2HKO Chansey and specially defensive Clefable with Diamond Storm after a bit of prior damage. However, doing so significantly lowers its special moves' damage output. A spread of 252 Atk / 4 SpA / 252 Spe can be used to significantly increase chances of OHKOing Mega Gardevoir, while a spread of 180 Atk / 76 SpA / 252 Spe retains the ability to OHKO Latios and Bisharp while improving the matchup against specially defensive threats.
Physically Offensive
252 Atk / 4 SpA / 252 Spe
Naive Nature
Maximum Attack investment makes this spread unique, allowing Mega Diancie to circumvent several checks to the specially offensive set such as Clefable and Amoonguss, while being more threatening to switch into for several Pokemon which are still counters such as Chansey at the expense of being able to reliably OHKO Bisharp and Latios with Moonblast. Maximum speed investment is still used to allow Diancie to stay in its stellar speed tier. A spread of 180 Atk / 76 SpA / 252 Spe can be used as it retains the ability to OHKO Latios and Bisharp while still improving the matchup against specially defensive threats.
Physical Wallbreaer
252 Atk / 4 SpD / 252 Spe
Jolly Nature
Full Attack and Speed investment maximize Diggersby's offensive capabilities. L An Adamant nature is preferred to do as much damage as possible and thus maximize Diggersby's wallbreaking potential. A Jolly nature can, however, be used to improve Diggersby's matchup against offensive teams by making it capable of outspeeding Breloom, Jolly Bisharp, Adamant Excadrill, most Mew variants, Timid Heatran, Adamant Dragonite, Adamant Gyarados, and Jolly Mega Tyranitar, among others.
Choice Band
252 Atk / 4 SpD / 252 Spe
Jolly Nature
252 Attack EVs maximize Diggersby's damage output. 252 Speed EVs let Diggersby outspeed anything notable up towards base 75 Speed. Maximun attack investment and a Choice Band allows Diggersby to hit as hard as possible.
Dragalge
Offensive
228 HP / 252 SpA / 28 Spe
Modest Nature
28 Speed EVs are used to outspeed Hippowdon, which would otherwise 2HKO with Earthquake. Maximum Special Attack EVs are used so that Dragalge can hit as hard as possible, and the rest of the EVs are put in HP so that Dragalge has good mixed bulk. 140 Speed EVs, at the expense of HP, can be used if you need Dragalge to outspeed Clefable and hit it with a powerful Sludge Wave before it can use Calm Mind or Tyranitar so that Dragalge can hit it with Focus Blast. If Dragalge is using Hidden Power Fire, Tyranitar isn't necessary to outspeed, so only 136 Speed EVs would be needed. Choice Specs is a possible item option to increase Dragalge's wallbreaking potential.
Specially Defensive
248 HP / 232 SpD / 28 Spe
Calm Nature
28 Speed EVs are used to outspeed Hippowdon, which would otherwise outspeed and 2HKO with Earthquake. 248 EVs are put in HP for maximum mixed walling potential, and the rest are put in Special Defense, as Dragalge should opt to specialize in walling specially based Pokemon.
Dragonite
Dragon Dance
252 Atk / 4 Def / 252 Spe
Adamant / Jolly Nature
Maximum Attack investment with an Adamant nature allows Dragonite to hit extremely hard. Maximum Speed investment is necessary to outspeed Pokemon such as Latias and Latios when Dragonite is at +1.
Empoleon
Utiity
248 HP / 8 Def / 252 SpD
Calm Nature
The given EV spread maximizes Empoleon's special bulk so it can effectively wall a lot of threatening Pokemon in OU, such as Latios, Latias, Sylveon, and Mega Altaria. An alternative EV spread of 248 HP / 200 Def / 60 SpD with a Bold nature can be used, as it enables Empoleon to live an Earthquake from Landorus-T and a Thunderbolt from Mega Manectric and hit them back with a Torrent-boosted Scald.
Excadrill
Offensive
252 Atk / 4 SpD / 252 Spe
Jolly / Adamant Nature
Maximum Attack and Speed investment allows Excadrill to hit as hard and fast as possible. An Adamant nature is generally preferable for the power boost, allowing Earthquake to 2HKO Ferrothorn with no boost and Slowbro with a boost. However, A Jolly nature is also a viable option to tie with opposing Excadrill at worst, outrun +2 Jolly Gyarados, and outrun neutral-natured base 100 Speed Pokemon such as Mega Charizard X, Mega Charizard Y, and Mega Gardevoir.
Feraligatr
Dragon Dance
252 Atk / 4 SpD / 252 Spe
Jolly Nature
Maximum Speed investment with a Jolly nature makes Feraligatr as fast as possible, while 252 EVs in Attack allow it to hit extremely hard. Life Orb boosts the power of all of Feraligatr's attacks, maximizing its damage output.
Ferrothorn
Utility
252 HP / 88 Def / 168 SpD
Relaxed / Sassy Nature
The given EV spread with a Relaxed nature lets Ferrothorn fare well against both physically and specially oriented opponents. 168 Special Defense EVs give Ferrothorn enough special bulk to survive two Ice Beams from +3 Manaphy. A Sassy nature with the given EV spread allows Ferrothorn to survive the combination of Hyper Voice + Focus Blast from Modest Mega Gardevoir most of the time, while still avoiding the 2HKO from +1 Mega Gyarados's Earthquake most of the time; the downside is that this leaves Ferrothorn much more susceptible to Crunch from Mega Gyarados and physical attackers in general, so it isn't typically recommended. If there's a lot of stress on Ferrothorn to handle physical attackers such as Azumarill, Life Orb Excadrill, Mega Gyarados, and Diggersby, more Defense investment can be run to tank hit from these Pokemon more easily. An example of a more physically defensive spread is 252 HP / 168 Def / 88 SpD avoids the 2HKO from Adamant Life Orb Excadrill after Stealth Rock damage. An alterante spread of 248 HP / 132 Def / 128 SpD with a Sassy Nature avoids the 2HKO from Mild Life Orb Kyurem-B's Ice Beam after Stealth Rock when using Shed Shell.