approved by Mizuhime
adapted and updated from Stratos' "On Assumptions" from early XY
All new players ask the same question when starting out playing Doubles OU which is "What does that mon do?" This thread is meant to provide a basis for what the top mons in the current format are known for doing. Each summary entails the most common EV spread, most common moveset, most common item choice, most common ability, and a brief idea of what that pokemon does. The mons used in this thread are pulled from the Tier 1, 1.5, and 2 pokemon from the ORAS Viability Rankings as they are the most effective and commonly seen mons in the format.
Tier 1
Aegislash
Amoonguss
Mega Charizard Y
Cresselia
Mega Diancie
Mega Kangaskhan
Keldeo
Landorus-therian
Rotom-Wash
Tier 1.5
Bisharp
Heatran
Hydreigon
Jirachi
Kyurem-Black
Latios
Mega Metagross
Talonflame
Terrakion
Thundurus-Incarnate
Tier 2
Mega Abomasnow
Azumarill
Mega Camerupt
Deoxys-Attack
Mega Gengar
Ludicolo
Mew
Politoed
Suicune
Venusaur
If you feel that I've left something off, don't hesitate to tell me
adapted and updated from Stratos' "On Assumptions" from early XY

Tier 1

-Always bulky special attacker
-Almost always max HP max SPA with a Quiet Nature
-Shadow Ball, Flash Cannon, and King’s Shields are guarantees for moves
-Wide Guard/Substitute/Shadow Sneak are all viable options for the remaining move
-Most common item choices are Weakness Policy (typically found on Wide Guard sets), Leftovers (typically found on Substitute sets), Safety Goggles, and Life Orb
-Stance Change
-Almost always max HP max SPA with a Quiet Nature
-Shadow Ball, Flash Cannon, and King’s Shields are guarantees for moves
-Wide Guard/Substitute/Shadow Sneak are all viable options for the remaining move
-Most common item choices are Weakness Policy (typically found on Wide Guard sets), Leftovers (typically found on Substitute sets), Safety Goggles, and Life Orb
-Stance Change

-Always bulky support
-EV spreads range from team to team but they are always 100% invested into bulk
-The “standard” spread is 252 HP, 184 DEF, 72 SPD with a relaxed nature
-Almost always run Giga Drain, Rage Powder, Spore, Protect
-On rare occasions Sludge Bomb is used over Giga Drain
-Most common item choices are Rocky Helmet and Sitrus Berry
-Regenerator
-EV spreads range from team to team but they are always 100% invested into bulk
-The “standard” spread is 252 HP, 184 DEF, 72 SPD with a relaxed nature
-Almost always run Giga Drain, Rage Powder, Spore, Protect
-On rare occasions Sludge Bomb is used over Giga Drain
-Most common item choices are Rocky Helmet and Sitrus Berry
-Regenerator

-At higher level of play, almost all Charizards are bulky, however, half of the Charizards found on the ladder are max SPA max SPE Timid
-Almost always run Heat Wave, Overheat, Solarbeam, Protect
-Very rarely the moves Tailwind, Focus Blast, and Hidden Power Ground are used over one of the fire STABs
-Item choice is about 99% Charizardite Y and 1% Charizardite X
-Blaze--->Drought
-Almost always run Heat Wave, Overheat, Solarbeam, Protect
-Very rarely the moves Tailwind, Focus Blast, and Hidden Power Ground are used over one of the fire STABs
-Item choice is about 99% Charizardite Y and 1% Charizardite X
-Blaze--->Drought

-Always bulky support
-Almost always max HP max DEF with a defense boosting nature
-Non-max HP max DEF spreads are usually found on Cresselias not carrying Calm Mind
-Most common moveset is Trick Room, Calm Mind, Moonlight, Psyshock
-Other less common, move choices are Helping Hand, Icy Wind, Ice Beam, and Sunny Day
-Most common item choices are Safety Goggles (always seen on the most popular Calm Mind set), Mental Herb, Sitrus Berry, and Leftovers
-Levitate
-Almost always max HP max DEF with a defense boosting nature
-Non-max HP max DEF spreads are usually found on Cresselias not carrying Calm Mind
-Most common moveset is Trick Room, Calm Mind, Moonlight, Psyshock
-Other less common, move choices are Helping Hand, Icy Wind, Ice Beam, and Sunny Day
-Most common item choices are Safety Goggles (always seen on the most popular Calm Mind set), Mental Herb, Sitrus Berry, and Leftovers
-Levitate

-Always fast mixed attacker
-Always runs an EV spread of 252 SPE, 208 ATK, 48 SPA with either a Hasty or Naive nature
-Always runs Diamond Storm, Moonblast, Earth Power, Protect
-Almost always is carrying Diancite - normal Diancie is only used on full trick room teams
-Note that Mega Diancie only gets its base 110 speed after mega evolution (the first turn you send it out it is still base 50 speed)
-Clear Body--->Magic Bounce
-Always runs an EV spread of 252 SPE, 208 ATK, 48 SPA with either a Hasty or Naive nature
-Always runs Diamond Storm, Moonblast, Earth Power, Protect
-Almost always is carrying Diancite - normal Diancie is only used on full trick room teams
-Note that Mega Diancie only gets its base 110 speed after mega evolution (the first turn you send it out it is still base 50 speed)
-Clear Body--->Magic Bounce

-Always fast physical attacker
-EV spread is usually max ATK and max SPE with an Adamant nature
-Rarely runs bulk
-Moveset is almost always fake out, Return/Double-Edge, Power Up Punch/Low Kick, Sucker Punch
-Occasionally Protect is used over Fake Out
-Rarely Ice Punch is used over the fighting move
-Always carries Kangaskhanite
-Note that before mega-evolution it has a base speed of 90
-Scrappy/Inner Focus---> Parental Bond
-EV spread is usually max ATK and max SPE with an Adamant nature
-Rarely runs bulk
-Moveset is almost always fake out, Return/Double-Edge, Power Up Punch/Low Kick, Sucker Punch
-Occasionally Protect is used over Fake Out
-Rarely Ice Punch is used over the fighting move
-Always carries Kangaskhanite
-Note that before mega-evolution it has a base speed of 90
-Scrappy/Inner Focus---> Parental Bond

-Always fast special attacker
-Always runs max SPE and max SPA with a Timid Nature
-Always runs Hydro Pump/Scald, Secret Sword, Taunt/Quick Guard, Protect
-Always carries Life Orb
-Justified
-Always runs max SPE and max SPA with a Timid Nature
-Always runs Hydro Pump/Scald, Secret Sword, Taunt/Quick Guard, Protect
-Always carries Life Orb
-Justified

-Always fast physical attacker
-Almost always runs max SPE and max ATK with an Adamant nature
-Almost always runs Earthquake, Rock Slide/Stone Edge, U-Turn, Superpower
-Occasionally Knock Off is used over Superpower
-Almost always runs Choice Scarf
-Other item choices are Choice Band, Leftovers, Assault Vest, and Life Orb
-Non-choice sets usually carry protect over Superpower or U-Turn
-Intimidate
-Almost always runs max SPE and max ATK with an Adamant nature
-Almost always runs Earthquake, Rock Slide/Stone Edge, U-Turn, Superpower
-Occasionally Knock Off is used over Superpower
-Almost always runs Choice Scarf
-Other item choices are Choice Band, Leftovers, Assault Vest, and Life Orb
-Non-choice sets usually carry protect over Superpower or U-Turn
-Intimidate

-Almost always bulky support
-Always has a lot of investment into HP and its Defenses
-Most common spread is 252 HP 100 DEF 116 SPA 40 SPD with a Modest nature
-Moveset is almost always Hydro Pump, Thunderbolt, Will-o-Wisp, Protect
-Thunder Wave is rarely seen over Will-o-Wisp or Protect
-Most common item is Sitrus Berry
-Rarely seen is choice scarf and choice specs
-Choice sets usually have Volt Switch and Trick as opposed to Will-o-Wisp and Protect on the bulky standard set
-Levitate
-Always has a lot of investment into HP and its Defenses
-Most common spread is 252 HP 100 DEF 116 SPA 40 SPD with a Modest nature
-Moveset is almost always Hydro Pump, Thunderbolt, Will-o-Wisp, Protect
-Thunder Wave is rarely seen over Will-o-Wisp or Protect
-Most common item is Sitrus Berry
-Rarely seen is choice scarf and choice specs
-Choice sets usually have Volt Switch and Trick as opposed to Will-o-Wisp and Protect on the bulky standard set
-Levitate
Tier 1.5

-Always fast physical attacker
-Always runs an EV spread of max SPE and max ATK with an Adamant nature
-Always runs Knock Off, Iron Head, Sucker Punch, Protect
-Most common item choices are split between life orb and focus sash
-(don’t try to intimidate bisharp because its ability, defiant, gives it an attack boost)
-Defiant
-Always runs an EV spread of max SPE and max ATK with an Adamant nature
-Always runs Knock Off, Iron Head, Sucker Punch, Protect
-Most common item choices are split between life orb and focus sash
-(don’t try to intimidate bisharp because its ability, defiant, gives it an attack boost)
-Defiant

-Always bulky/fast special attacker
-Usually runs an EV spread of 52 HP 252 SPA 204 SPE with a Modest nature however more bulkier sets are used as well
-Most common moveset is Heat Wave, Earth Power, Substitute, Protect
-Flash Cannon is sometimes used over Substitute
-Most common items are Leftovers (primarily used on the Substitute set), Safety Goggles, Shuca Berry, and Life Orb
-Flash Fire
-Usually runs an EV spread of 52 HP 252 SPA 204 SPE with a Modest nature however more bulkier sets are used as well
-Most common moveset is Heat Wave, Earth Power, Substitute, Protect
-Flash Cannon is sometimes used over Substitute
-Most common items are Leftovers (primarily used on the Substitute set), Safety Goggles, Shuca Berry, and Life Orb
-Flash Fire

-Always fast special attacker
-Almost always runs an EV spread of max SPE and max SPA with a Modest nature
-Most common moveset is Draco Meteor, Dark Pulse, Fire Blast/Earth Power/Tailwind, Protect
-Most common item is Life Orb
-Choice Specs and Choice Scarf are seen occasionally, on these sets Protect is dropped for another coverage move
Levitate
-Almost always runs an EV spread of max SPE and max SPA with a Modest nature
-Most common moveset is Draco Meteor, Dark Pulse, Fire Blast/Earth Power/Tailwind, Protect
-Most common item is Life Orb
-Choice Specs and Choice Scarf are seen occasionally, on these sets Protect is dropped for another coverage move
Levitate

-Always bulky follow me
-Always heavily invested in bulk
-Most common spread is 252 HP 68 DEF 80 SPD 108 SPE with a Careful nature
-Most common moveset is Follow Me, Iron Head, Icy Wind/Thunder Wave, Protect
-Often paired with set up sweepers or frail pokemon that need redirection
-Most common item choices are Sitrus Berry and Safety Goggles
-Serene Grace
-Always heavily invested in bulk
-Most common spread is 252 HP 68 DEF 80 SPD 108 SPE with a Careful nature
-Most common moveset is Follow Me, Iron Head, Icy Wind/Thunder Wave, Protect
-Often paired with set up sweepers or frail pokemon that need redirection
-Most common item choices are Sitrus Berry and Safety Goggles
-Serene Grace

-Almost always bulky special attacker
-Most common spread is 108 HP 252 SPA 148 SPE with a Modest nature
-Most common moveset is Ice Beam, Earth Power, Substitute, Protect
-Most common item is Leftovers
-Occasionally seen is choice scarf which usually carries Fusion Bolt and Dragon Claw over Substitute and Protect on the standard bulky sub set
-Teravolt
-Most common spread is 108 HP 252 SPA 148 SPE with a Modest nature
-Most common moveset is Ice Beam, Earth Power, Substitute, Protect
-Most common item is Leftovers
-Occasionally seen is choice scarf which usually carries Fusion Bolt and Dragon Claw over Substitute and Protect on the standard bulky sub set
-Teravolt

-Always fast special attacker
-Most common EV spread is max SPE and max SPA with a Timid nature
-Most common moveset is Draco Meteor, Psychic/Psyshock, Tailwind, Protect
-On rare occasions HP Ground/Fire is used over Tailwind
-Always carries Life Orb
-Levitate
-Most common EV spread is max SPE and max SPA with a Timid nature
-Most common moveset is Draco Meteor, Psychic/Psyshock, Tailwind, Protect
-On rare occasions HP Ground/Fire is used over Tailwind
-Always carries Life Orb
-Levitate

-Always bulky/fast physical attacker
-Most common EV spread is max SPE max ATK with a Jolly nature, however, bulkier spreads are sometimes seen
-Most common moveset is Iron Head, Zen Headbutt, Ice Punch/Hammer Arm/Substitute/Bullet Punch, Protect
-Third moveslot is based off of the team’s needs and player preference
-Always carries Metagrossite
-Clear Body--->Tough Claws
-Most common EV spread is max SPE max ATK with a Jolly nature, however, bulkier spreads are sometimes seen
-Most common moveset is Iron Head, Zen Headbutt, Ice Punch/Hammer Arm/Substitute/Bullet Punch, Protect
-Third moveslot is based off of the team’s needs and player preference
-Always carries Metagrossite
-Clear Body--->Tough Claws

-Always fast physical attacker
-Most common EV spread is max SPE and max ATK with an Adamant nature
-Most common moveset is Brave Bird, Flare Blitz, Tailwind/Will-o-Wisp/Quick Guard, Protect/Steel Wing
-Most common item is Life Orb however Sharp Beak is seen some and Choice Band is seen rarely
-Gale Wings
-Most common EV spread is max SPE and max ATK with an Adamant nature
-Most common moveset is Brave Bird, Flare Blitz, Tailwind/Will-o-Wisp/Quick Guard, Protect/Steel Wing
-Most common item is Life Orb however Sharp Beak is seen some and Choice Band is seen rarely
-Gale Wings

-Always fast physical attacker
-Always runs max SPE and max ATK with a Jolly nature
-Most common moveset is Rock Slide, Close Combat, Quick Guard/Stone Edge/Taunt, Protect
-If paired with either Weavile or Whimsicott, the third move is most likely Earthquake
-Most common items are Focus Sash, Life Orb, and Lum Berry
-Justified
-Always runs max SPE and max ATK with a Jolly nature
-Most common moveset is Rock Slide, Close Combat, Quick Guard/Stone Edge/Taunt, Protect
-If paired with either Weavile or Whimsicott, the third move is most likely Earthquake
-Most common items are Focus Sash, Life Orb, and Lum Berry
-Justified

-Sometimes fast offensive support
-Sometimes bulky support
-EV spread is either max SPE and max SPA with a Timid nature or very bulky with a bulk increasing nature
-Fast set usually runs Thunderbolt, Thunder Wave, Taunt/Hidden Power Ice/Flash Cannon, Protect
-Bulky set usually runs Thunderbolt, Thunder Wave, Taunt, Hidden Power Ice
-Most common item choices are Life Orb(on the fast set) and Sitrus Berry(on the bulky set)
-Prankster
-Sometimes bulky support
-EV spread is either max SPE and max SPA with a Timid nature or very bulky with a bulk increasing nature
-Fast set usually runs Thunderbolt, Thunder Wave, Taunt/Hidden Power Ice/Flash Cannon, Protect
-Bulky set usually runs Thunderbolt, Thunder Wave, Taunt, Hidden Power Ice
-Most common item choices are Life Orb(on the fast set) and Sitrus Berry(on the bulky set)
-Prankster
Tier 2

-Always slow bulky mixed attacker
-Always used on Trick Room teams
-Most common EV spread is max HP max SPA with a Quiet Nature and no SPE IVs
-Most common moveset is Blizzard, Giga Drain/Wood Hammer, Ice Shard, Protect
-Almost always carries Abomasnowite
-Snow Warning--->Snow Warning
-Always used on Trick Room teams
-Most common EV spread is max HP max SPA with a Quiet Nature and no SPE IVs
-Most common moveset is Blizzard, Giga Drain/Wood Hammer, Ice Shard, Protect
-Almost always carries Abomasnowite
-Snow Warning--->Snow Warning

-Almost always bulky set up physical sweeper
-Almost always runs max HP and max ATK with an Adamant nature
-Occasionally some sets have less HP and more SPE
-Most common moveset is Belly Drum, Aqua Jet, Play Rough, Protect
-Often paired with redirection and Fake Out users
-Almost always carries Sitrus Berry
-Very Rarely carries Choice Band and Assault Vest
-On those sets Waterfall/Superpower/Knock Off are used as coverage moves to replace Belly Drum and Protect
-Huge Power
-Almost always runs max HP and max ATK with an Adamant nature
-Occasionally some sets have less HP and more SPE
-Most common moveset is Belly Drum, Aqua Jet, Play Rough, Protect
-Often paired with redirection and Fake Out users
-Almost always carries Sitrus Berry
-Very Rarely carries Choice Band and Assault Vest
-On those sets Waterfall/Superpower/Knock Off are used as coverage moves to replace Belly Drum and Protect
-Huge Power

-Always bulky slow special attacker
-Always used on Trick Room teams
-Most common EV spread is max HP and max SPA with a Quiet nature and no SPE IVs
-Most common moveset is Heat Wave, Earth Power, Ancient Power/Fire Blast, Protect
-Always carries Cameruptite
-Magma Armor--->Sheer Force
-Always used on Trick Room teams
-Most common EV spread is max HP and max SPA with a Quiet nature and no SPE IVs
-Most common moveset is Heat Wave, Earth Power, Ancient Power/Fire Blast, Protect
-Always carries Cameruptite
-Magma Armor--->Sheer Force

-Always fast mixed attacker
-Most common EV spread is 20 ATK 252 SPA 236 SPE with a Rash nature
-Most common moveset is Psycho Boost, Ice Beam, Superpower/Extreme Speed, Protect
-Always carries Focus Sash
-Pressure
-Most common EV spread is 20 ATK 252 SPA 236 SPE with a Rash nature
-Most common moveset is Psycho Boost, Ice Beam, Superpower/Extreme Speed, Protect
-Always carries Focus Sash
-Pressure

-Usually fast special attacker
-Rarely perish trapper
-Most common EV spread for fast special attacker set is max SPE and max SPA with a Timid nature
-Most common EV spread for perish trapper set is max HP and max SPE with a Timid nature
-Most common moveset for fast special attacker set is Shadow Ball, Sludge Bomb, Disable/Will-o-Wisp, Protect
-Most common moveset for perish trapper set is Shadow Ball/Sludge Bomb, Perish Song, Protect, Substitute
-Almost always carries Gengarite
-Levitate--->Shadow Tag
-Rarely perish trapper
-Most common EV spread for fast special attacker set is max SPE and max SPA with a Timid nature
-Most common EV spread for perish trapper set is max HP and max SPE with a Timid nature
-Most common moveset for fast special attacker set is Shadow Ball, Sludge Bomb, Disable/Will-o-Wisp, Protect
-Most common moveset for perish trapper set is Shadow Ball/Sludge Bomb, Perish Song, Protect, Substitute
-Almost always carries Gengarite
-Levitate--->Shadow Tag

-Always special rain sweeper
-Usually runs max SPA and enough SPE to outspeed Rotom-Wash outside of rain while dumping the rest in HP with a Modest nature
-Most common moveset is Fake Out, Hydro Pump, Giga Drain, Ice Beam
-Most common items are Assault Vest and Life Orb
-Swift Swim
-Usually runs max SPA and enough SPE to outspeed Rotom-Wash outside of rain while dumping the rest in HP with a Modest nature
-Most common moveset is Fake Out, Hydro Pump, Giga Drain, Ice Beam
-Most common items are Assault Vest and Life Orb
-Swift Swim

-Always fast support
-Most common EV spread is max HP and max SPE with a Jolly nature
-Most common moveset is Fake Out, Transform, Protect, Filler
-The last move can be Ally Switch, Will-o-Wisp, Trick Room, Super Fang, Stealth Rock, or Taunt
-Often paired with set up sweepers that it transforms into
-Most common items are Leftovers and Sitrus Berry
-Synchronize
-Most common EV spread is max HP and max SPE with a Jolly nature
-Most common moveset is Fake Out, Transform, Protect, Filler
-The last move can be Ally Switch, Will-o-Wisp, Trick Room, Super Fang, Stealth Rock, or Taunt
-Often paired with set up sweepers that it transforms into
-Most common items are Leftovers and Sitrus Berry
-Synchronize

-Usually bulky special attacker
-Usually puts its EVs into bulk in order to conserve rain
-Most common moveset is Scald, Ice Beam/Icy Wind, Helping Hand/Encore, Protect
-Used primarily to get up rain and allow other team members to do better
-Most common item choices are Sitrus Berry and Damp Rock
-Rarely seen is Choice Scarf
-Drizzle
-Usually puts its EVs into bulk in order to conserve rain
-Most common moveset is Scald, Ice Beam/Icy Wind, Helping Hand/Encore, Protect
-Used primarily to get up rain and allow other team members to do better
-Most common item choices are Sitrus Berry and Damp Rock
-Rarely seen is Choice Scarf
-Drizzle

-Always bulky support
-Always is EV’d to KO Landorus-therian with Ice Beam and outspeed scarf Landorus-Therian in Tailwind with the rest of its EVs in bulk
-Most common moveset is Scald/Hydro Pump, Ice Beam, Tailwind, Snarl/Protect/Mirror Coat
-Most common items are Sitrus Berry and Leftovers
-Pressure
-Always is EV’d to KO Landorus-therian with Ice Beam and outspeed scarf Landorus-Therian in Tailwind with the rest of its EVs in bulk
-Most common moveset is Scald/Hydro Pump, Ice Beam, Tailwind, Snarl/Protect/Mirror Coat
-Most common items are Sitrus Berry and Leftovers
-Pressure

-Usually special sun attacker
-Most common EV spread is max SPE and max SPA with a Modest nature
-Most common moveset is Giga Drain, Sludge Bomb, Sleep Powder, Protect
-Most common item choices are Life Orb and Focus Sash and on occasion Wide Lens
-Rarely seen is Venusaurite
-Chlorophyll
-Most common EV spread is max SPE and max SPA with a Modest nature
-Most common moveset is Giga Drain, Sludge Bomb, Sleep Powder, Protect
-Most common item choices are Life Orb and Focus Sash and on occasion Wide Lens
-Rarely seen is Venusaurite
-Chlorophyll
If you feel that I've left something off, don't hesitate to tell me
Last edited by a moderator: