Project USUM OU Victim of the Week [Week 49: Dragon Dance Gyarados]

[Creator of Chaos]

Since I can I'm going to reserve magic guard Clefable as a check (Would counter but +Z hyper beam is a thing)

 

[Eclipse]

Mimikyu as a counter.

Mimikyu @ Life Orb / Ghostium Z
Ability: Disguise
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Shadow Sneak
- Shadow Claw
- Play Rough

Mimikyu is the strongest answer to Pheromosa that Hyper Offense has to offer. It can revenge with ease due to Disguise, but above that, it 4x resists Bug, is immune to Focus Blast/Hyper Beam, and has the special bulk to even take +1 Ice Beams with ease if its Disguise was broken beforehand. This gives Mimikyu free opportunity to set up a Swords Dance and cleanly OHKO Phero with +2 LO Sneak.

+2 252 Atk Life Orb Mimikyu Shadow Sneak vs. 0 HP / 0 Def Pheromosa: 285-335 (100.7 - 118.3%) -- guaranteed OHKO

224+ SpA Pheromosa Ice Beam vs. 0 HP / 4 SpD Mimikyu: 106-125 (42.2 - 49.8%) -- 89.5% chance to 2HKO after Stealth Rock

+1 224+ SpA Pheromosa Ice Beam vs. 0 HP / 4 SpD Mimikyu: 158-186 (62.9 - 74.1%) -- guaranteed 2HKO after Stealth Rock

 

[david0895]

Alolan Marowak as counter

Marowak-Alola @ Thick Club
Ability: Lightning Rod
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Shadow Bone
- Fire Punch
- Bonemerang
- Will-O-Wisp

Probably the best counter that we have at the moment: immunity to Focus Blast and Hyper Beam and it resists to all the other moves

+1 224+ SpA Pheromosa Bug Buzz vs. 0 HP / 4 SpD Marowak-Alola: 74-87 (28.3 - 33.3%) -- guaranteed 3HKO after Stealth Rock
+1 224+ SpA Pheromosa Hidden Power Fire vs. 0 HP / 4 SpD Marowak-Alola: 66-78 (25.2 - 29.8%) -- guaranteed 3HKO after Stealth Rock
+1 224+ SpA Pheromosa Ice Beam vs. 0 HP / 4 SpD Marowak-Alola: 99-116 (37.9 - 44.4%) -- guaranteed 2HKO after Stealth Rock
(and the rocks are the worst case)

252+ Atk Thick Club Marowak-Alola Fire Punch vs. 0 HP / 0 Def Pheromosa: 830-980 (293.2 - 346.2%) -- guaranteed OHKO

 

[Jucherz]

Shedinja @ Focus Sash
Ability: Wonder Guard
EVs: 252 Atk / 156 Spe
Lonely Nature
IVs: 0 HP / 0 Def / 0 SpD
- Baton Pass
- Protect
- Shadow Sneak
- Will-O-Wisp

Shedinja is a hard counter. Thanks to Wonder Guard it is immune to all Pheromosa's attacks. Only really usable on stall teams though.

 

[snaildelagate]

Cofagrigus as a Counter

Cofagrigus @ Leftovers / Sitrus Berry / Ghostnium Z
Ability: Mummy
EVs: 252 HP / 252 SpA / 4 SpD
Quiet Nature
IVs: 0 Atk / 0 Spe
- Trick Room
- Nasty Plot
- Shadow Ball
- Energy Ball / Hidden Power Fighting

This is Standard TR Nasty Plot Cofagrigus who lives any attack by Pheromosa at +1 taking the most from +1 ice beam:

+1 224+ SpA Pheromosa Ice Beam vs. 252 HP / 0 SpD Cofagrigus: 158-187 (49.3 - 58.4%) -- 98.8% chance to 2HKO

Cofagrigus switches in safely on all variants of Pheromosa as well except Specs Phero. Sitrus Berry allows Cofagrigus to live 2 +1 Ice Beams which allows Cofagrigus to act as a safer counter to Pheromosa, while Ghostnium-Z Never Ending Nightmare is a OHKO against +1 Pheromosa so both items turn Cofagrigus from a soft counter to a completely hard counter to QD Pheromosa. (You could also run hp flying if you want to OHKO with lefties since shadow ball is great coverage already but it hurts Cofagrigus's effectiveness vs. more bulky teams a fair bit since its sub-par coverage in any other situation.)

 

[Futatsuiwa of Sado]

Reserving Mega Pinsir as a Check

 

[vso]

Reserving Toxapex as a check

Toxapex @ Black Sludge
Ability: Regenerator
EVs: 252 HP / 136 Def / 120 SpD
Calm Nature
IVs: 0 Atk
- Scald
- Recover
- Toxic / Toxic Spikes
- Haze
Toxapex can tank any hit besides Z hyper beam relatively well, haze out boosts and toxic or toxic spikes in free turns. The special defense investment allows you to take a +1 Pheromosa Breaknetz Blitz after stealth rocks. This allows you to haze, toxic, tspikes, or recover in the free turn. Recovering forces another hyper beam, making it easy to revenge kill, considering its pheromosa. Tspikes can help vs stuff like zygarde, if you do not think it's z hyper beam. Even though it's not slashed, toxapex has to be wary of hp electric. Check.

 

[Leo]

Reserving Band Zygarde as a check

Zygarde @ Choice Band
Ability: Aura Break
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Thousand Arrows
- Outrage
- Extreme Speed
- Iron Tail

While its Dragon/Ground typing makes it extremely vulnerable to Ice Beam, Zygarde is capable of easily revenge killing Pheromosa after a bit of prior damage thanks to Extreme Speed, a very strong priority move when backed up by a Choice Band. It has to be wary of opposing Psychic terrain preventing priority moves from hitting Pheromosa tho, but all in all it's a great check

 

[Cheryl.]

Mantine @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 240 Def / 16 SpD
Calm Nature
- Scald
- Roost
- Defog
- Toxic / Air Slash

Mantine is a Check to QD Pheromosa as it resists both of Phero's STABs and takes very little from Ice Beam due to it's good special bulk. Mantine can Roost up to keep itself healthy for Pheromosa's onslaughts, and wear Phero down with Toxic or Scald, or straight-up OHKO even +1 Phero with Air Slash if you decide to use that. However, it is only a check because Normalium Z variants heavily chunk Mantine at +1, having a small chance to OHKO after Stealth Rock, which Mantine is very suspectible to as it is usually used as a Defogger and is weak to Rocks. Even All-Out Pummeling variants can put the hurt on Mantine as AoP 2HKOs Mantine at +1 after SR, meaning you only need to chip it down a bit before being able to KO it. However, Mantine's good bulk and access to reliable recovery still make it a decent-ish answer to this absolute monster.

Calcs

+1 224+ SpA Pheromosa Focus Blast vs. 252 HP / 16+ SpD Mantine: 110-130 (29.4 - 34.7%) -- 100% chance to 4HKO after Leftovers recovery
+1 224+ SpA Pheromosa Focus Blast vs. 252 HP / 16+ SpD Mantine: 110-130 (29.4 - 34.7%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa Ice Beam vs. 252 HP / 16+ SpD Mantine: 111-131 (29.6 - 35%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 16+ SpD Mantine: 174-206 (46.5 - 55%) -- 13.3% chance to 2HKO after Leftovers recovery
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 16+ SpD Mantine: 174-206 (46.5 - 55%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 16+ SpD Mantine: 245-289 (65.5 - 77.2%) -- guaranteed 2HKO after Leftovers recovery
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 16+ SpD Mantine: 245-289 (65.5 - 77.2%) -- 18.8% chance to OHKO after Stealth Rock

0 SpA Mantine Scald vs. 0 HP / 32 SpD Pheromosa: 144-169 (50.8 - 59.7%) -- guaranteed 2HKO
0 SpA Mantine Scald vs. +1 0 HP / 32 SpD Pheromosa: 96-114 (33.9 - 40.2%) -- guaranteed 3HKO
0 SpA Mantine Air Slash vs. +1 0 HP / 32 SpD Pheromosa: 360-424 (127.2 - 149.8%) -- guaranteed OHKO

 

[GnralLao]

I don't really agree with Shedinja being a counter (existence of SR), but I'll let the hosts decide on what to do with the entry.

Anyway, I'll write M-Pinsir as a check (more than six hours of delay).

Check

Pinsir @ Pinsirite
Ability: Hyper Cutter
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Return
- Quick Attack
- Close Combat

Even though M-Pinsir resists both of Pheromosa's STAB moves, it's not advised to hard-switch into Pheromosa (especially after SR) due to the latter's brute strength and coverage options (even though it's quite scarce). However, since Pheromosa lacks priority moves, once M-Pinsir faces it on the field, it will always outspeed and OHKO Pheromosa with an Aerilate-boosted Quick Attack. Again, like against every other mon, it'd be better if SR were setup first, since if Pheromosa sports a Focus Sash, M-Pinsir could be greatly damaged in the process of taking it out.

Calcs

224+ SpA Pheromosa Bug Buzz vs. 0 HP / 4 SpD Pinsir-Mega: 90-106 (33.2 - 39.1%) -- 100% chance to 3HKO
224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 0 HP / 4 SpD Pinsir-Mega: 94-111 (34.6 - 40.9%) -- guaranteed 3HKO
224+ SpA Pheromosa Ice Beam vs. 0 HP / 4 SpD Pinsir-Mega: 240-284 (88.5 - 104.7%) -- 31.3% chance to OHKO
224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 0 HP / 4 SpD Pinsir-Mega: 266-313 (98.1 - 115.4%) -- 87.5% chance to OHKO

252 Atk Aerilate Pinsir-Mega Quick Attack vs. 0 HP / 0 Def Pheromosa: 768-904 (271.3 - 319.4%) -- guaranteed OHKO

 

[Martin]

Check

Greninja @ Choice Specs
Ability: Battle Bond
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Water Shuriken
- Hydro Pump
- Dark Pulse
- U-turn / Ice Beam

Even after a Quiver Dance, Ash Greninja has around a one-in-three chance to KO Pheromosa with as little as one switch in to Stealth Rock for prior damage (SR+1 Spike or 2 SR switch-ins guarantees the KO). If Pheromosa hasn't set up yet, it doesn't even need the prior damage to net this KO. That said, it needs to activate Battle Bond to really stand any chance of revenge killing it semi-consistently, and it can't switch in directly either--limiting it to revenge killing.

 

[HotFuzzBall]

Mega Venusaur as a Check

Venusaur @ Venusaurite
Ability: Chlorophyll
EVs: 232 HP / 180 Def / 80 SpD / 16 Spe
Bold Nature
- Giga Drain
- Sludge Bomb
- Synthesis
- Hidden Power Fire

Mega Venusaur can switch into either Ice Beam or Focus Blast at +1, but, it cannot afford to switch into Bug Buzz or Breakneck Blitz at +1 since it is 2HKOed. Mega Venusaur can threaten if it with Sludge Bomb and have a good chance to knock it out after rocks, however, if Pheromosa does set up, Sludge Bomb will still be a guaranteed 2hko.

0 SpA Venusaur-Mega Sludge Bomb vs. +1 0 HP / 32 SpD Pheromosa: 153-181 (54 - 63.9%) -- guaranteed 2HKO after Stealth Rock
0 SpA Venusaur-Mega Sludge Bomb vs. 0 HP / 32 SpD Pheromosa: 229-271 (80.9 - 95.7%) -- 56.3% chance to OHKO after Stealth Rock
___

+1 224+ SpA Pheromosa Ice Beam vs. 232 HP / 80 SpD Thick Fat Venusaur-Mega: 132-156 (36.7 - 43.4%) -- guaranteed 3HKO
+1 224+ SpA Pheromosa Bug Buzz vs. 232 HP / 80 SpD Venusaur-Mega: 198-234 (55.1 - 65.1%) -- guaranteed 2HKO
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 232 HP / 80 SpD Venusaur-Mega: 292-344 (81.3 - 95.8%) -- guaranteed 2HKO

224+ SpA Pheromosa Bug Buzz vs. 232 HP / 80 SpD Venusaur-Mega: 132-156 (36.7 - 43.4%) -- guaranteed 3HKO
224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 232 HP / 80 SpD Venusaur-Mega: 195-230 (54.3 - 64%) -- guaranteed 2HKO

 

[Aragorn the King]

Tapu Fini as a check

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 192 Def / 16 SpD / 52 Spe
Calm Nature
- Taunt
- Nature's Madness
- Moonblast
- Defog

Tapu Fini can nearly always switch into a Pheromosa, take two +0 hits or one +1 hit, and then kill with Moonblast. Moonblast is a guaranteed KO when Pheromosa is at +0 and a guaranteed KO after SR when Pheromosa is at +1.

Assuming All-out Pummeling Pheromosa, Fini can switch into a Quiver Dance and then easily take the All-out Pummeling and kill with Moonblast. It can also take a Focus Blast + an All-out Pummeling at +0.

Assuming Pheromosa has an unbroken Focus Sash, a healthy Fini is capable of taking two +1 Focus Blasts and killing with Moonblast.

Assuming Breakneck Blitz, however, trouble arises, as a +1 Breakneck Blitz can do up to 90% to Tapu Fini, therefore killing it after Stealth Rock. A 100% healthy Tapu Fini without hazards on its side can always take on Normalium Z. However, the odds of Tapu Fini having taken 0 previous damage and 0 damage from hazards (it's a defogger), is low, so I classified it as a check to QD Pheromosa.

 

[Lemon Ginger]

The Pringles Guy as a Counter

Jellicent @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Scald
- Hex / Shadow Ball
- Recover
- Taunt / Will-o-wisp

Jellicent hardwalls pretty much all pheromosa variants. The QD set can't even hurt it. mixed sets can't touch it either. Jellicent can then 2HKO back with scald. Shadow ball vs Hex is entirely dependent on whether you want to run taunt or will O. I like taunt for additional use against fatter teams.

Calcs:
Focus blast: Zippo
Hyper beam: Zippo
Ice Beam: basically nothing

+1 224+ SpA Pheromosa Bug Buzz vs. 252 HP / 0 SpD Jellicent: 118-140 (29.2 - 34.6%) -- 99.9% chance to 4HKO after Leftovers recovery
+6 224+ SpA Pheromosa Bug Buzz vs. 248 HP / 0 SpD Jellicent: 315-372 (78.1 - 92.3%) -- guaranteed 2HKO after Leftovers recovery

0 SpA Jellicent Scald vs. 0 HP / 32 SpD Pheromosa: 151-178 (53.3 - 62.8%) -- guaranteed 2HKO

 

[david0895]

Mega Pinsir was already reserved

Reservation has a limit of 6 hours

Mantine as a check.

Mantine @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 240 Def / 16 SpD
Calm Nature
- Scald
- Roost
- Defog/Haze
- Air Slash

Mantine can actually take any move from +1 Pheromosa, (need to be careful with Hyper Beam if Rocks are up though) and OHKO it with Air Slash, the only way to Pheromosa to actually beat Mantine (without critical hits) is by using Breakneck Blitz to OHKO it at +1 with Rocks, there is 18.8% chance of happening, even Sash Pheromosa can't beat Mantine counting with a 2HKO from Air Slash, since with Rocks up it can only 3HKO, so Mantine can easily switch in and beat Pheromosa on 1v1. Note that with Air Slash you won't have Toxic, but is required to beat Pheromosa.

Calcs

Z Move
0 SpA Mantine Air Slash vs. +1 0 HP / 32 SpD Pheromosa: 360-424 (127.2 - 149.8%) -- guaranteed OHKO
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 16+ SpD Mantine: 174-206 (46.5 - 55%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 16+ SpD Mantine: 245-289 (65.5 - 77.2%) -- guaranteed 2HKO after Leftovers recovery
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 16+ SpD Mantine: 245-289 (65.5 - 77.2%) -- 18.8% chance to OHKO after Stealth Rock

Sash
0 SpA Mantine Air Slash vs. +1 0 HP / 32 SpD Pheromosa: 360-424 (127.2 - 149.8%) -- guaranteed OHKO
+1 224+ SpA Pheromosa Focus Blast vs. 248 HP / 16+ SpD Tapu Fini: 118-139 (34.4 - 40.5%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery

Mantine was already done

View attachment 79851
Mantine @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 240 Def / 16 SpD
Calm Nature
- Scald
- Roost
- Defog
- Toxic / Air Slash

Mantine is a Check to QD Pheromosa as it resists both of Phero's STABs and takes very little from Ice Beam due to it's good special bulk. Mantine can Roost up to keep itself healthy for Pheromosa's onslaughts, and wear Phero down with Toxic or Scald, or straight-up OHKO even +1 Phero with Air Slash if you decide to use that. However, it is only a check because Normalium Z variants heavily chunk Mantine at +1, having a small chance to OHKO after Stealth Rock, which Mantine is very suspectible to as it is usually used as a Defogger and is weak to Rocks. Even All-Out Pummeling variants can put the hurt on Mantine as AoP 2HKOs Mantine at +1 after SR, meaning you only need to chip it down a bit before being able to KO it. However, Mantine's good bulk and access to reliable recovery still make it a decent-ish answer to this absolute monster.

Calcs

+1 224+ SpA Pheromosa Focus Blast vs. 252 HP / 16+ SpD Mantine: 110-130 (29.4 - 34.7%) -- 100% chance to 4HKO after Leftovers recovery
+1 224+ SpA Pheromosa Focus Blast vs. 252 HP / 16+ SpD Mantine: 110-130 (29.4 - 34.7%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa Ice Beam vs. 252 HP / 16+ SpD Mantine: 111-131 (29.6 - 35%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 16+ SpD Mantine: 174-206 (46.5 - 55%) -- 13.3% chance to 2HKO after Leftovers recovery
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 16+ SpD Mantine: 174-206 (46.5 - 55%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 16+ SpD Mantine: 245-289 (65.5 - 77.2%) -- guaranteed 2HKO after Leftovers recovery
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 16+ SpD Mantine: 245-289 (65.5 - 77.2%) -- 18.8% chance to OHKO after Stealth Rock

0 SpA Mantine Scald vs. 0 HP / 32 SpD Pheromosa: 144-169 (50.8 - 59.7%) -- guaranteed 2HKO
0 SpA Mantine Scald vs. +1 0 HP / 32 SpD Pheromosa: 96-114 (33.9 - 40.2%) -- guaranteed 3HKO
0 SpA Mantine Air Slash vs. +1 0 HP / 32 SpD Pheromosa: 360-424 (127.2 - 149.8%) -- guaranteed OHKO

 

[ayman x]

Alolan Muk as a check.

Muk-Alola @ Assault Vest
Ability: Poison Touch
EVs: 252 HP / 128 Atk / 128 SpD
Adamant Nature
- Poison Jab
- Knock Off
- Pursuit
- Shadow Sneak​

The spread is optimised to always take one All Out Pummelling after Stealth Rock damage, which is the hardest hitting attack Pheromosa can go for against Muk. (+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 128 SpD Assault Vest Muk-Alola: 306-361 (73.9 - 87.1%) -- guaranteed 2HKO after Stealth Rock)

Muk then has a good chance of picking it off after Stealth Rock damage with Poison Jab or can revenge with Poison Jab + Shadow Sneak.

 

[Natan]

Reservation has a limit of 6 hours

Mantine was already done

Sorry I didn't see it

 

[Hugin]

Doublade as a counter.

Tweedledee (Doublade) @ Eviolite
Ability: No Guard
EVs: 248 HP / 64 Atk / 196 SpD
Adamant Nature
- Shadow Sneak
- Iron Head
- Sacred Sword
- Swords Dance

Yes, it's lower-tier, but it's the only thing I know that can actually switch in on basically any Phero. My normal build runs more ATK, but these EVs will let you switch in on an HP Fire(/Ghost/Ground) with rocks up, live a second one, and then kill with Iron Head+Shadow Sneak. Doesn't do much else against the monsters in OU, but another priority user is always good, right?

 

[Jojobobo]

AV SpDef Magearna as a counter.

Magearna @ Assault Vest
Ability: Soul-Heart
EVs: 248 HP / 80 SpA / 180 SpD
Modest Nature
- Fleur Cannon
- Flash Cannon
- Volt Switch
- Aura Sphere

By investing in SpDef, Pheromosa can't 2HKO even after Rocks with an unboosted Focus Blast then All-Out Pummelling combo (93.6% on max rolls, which just misses on the 2HKO with the 6.25% of SR), and at the +1 has no chance of an OHKO by All-Out Pummelling again after rocks (representing a QD on your switch). In response, Magearna melts Pheromosa's face with Fleur Cannon.

224+ SpA Pheromosa Focus Blast vs. 248 HP / 180 SpD Assault Vest Magearna: 111-132 (30.5 - 36.3%) -- 53.2% chance to 3HKO
224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 248 HP / 180 SpD Assault Vest Magearna: 177-208 (48.7 - 57.3%) -- 93.4% chance to 2HKO
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 248 HP / 180 SpD Assault Vest Magearna: 264-312 (72.7 - 85.9%) -- guaranteed 2HKO
+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 248 HP / 180 SpD Assault Vest Magearna: 93-109 (25.6 - 30%) -- guaranteed 4HKO
+1 224+ SpA Pheromosa Hidden Power Fire vs. 248 HP / 180 SpD Assault Vest Magearna: 112-134 (30.8 - 36.9%) -- 67.4% chance to 3HKO

80+ SpA Magearna Fleur Cannon vs. +1 0 HP / 32 SpD Pheromosa: 548-648 (193.6 - 228.9%) -- guaranteed OHKO

More EVs can be moved into SpDef to make your margins of survival better (it allows you to miss out on the +1 Focus Blast 2HKO from sash sets almost all of the time) but you lose out a bit on offensive power. Fleur Cannon can also be traded for Dazzling Gleam if you were extremely worried about the 90% accuracy biting you in the ass, which still OHKOes at the +1 SpDef.

 

[Creator of Chaos]

Clefable as a Check

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 184 Def / 72 SpD
Calm Nature
- Calm Mind
- Moonblast
- Soft-Boiled
- Flamethrower / Thunder wave

Standard CM Clefable can come in on virtually any pheromosa set and come out on top thanks to its good typing and magic guard. At +0 no move on this Mosa can 2hko nor can the combination of all out pummelling + Focus blast deliver a kill and even at +1 Clef will survive any move intact and OHKO with moonblast after Stealth rock. It should also be noted bold varients can do virtually the same thing but with the added benefit of handling Physical Mosa better to but this is about the special set so. unfortunatly things get a little tricky with Normalium Z Hyper beam which at +1 has a 60% to Kill everyones favourite fairy

Rest in peace's Pheromosa
0 SpA Clefable Moonblast vs. 0 HP / 32 SpD Pheromosa: 390-462 (137.8 - 163.2%) -- guaranteed OHKO
0 SpA Clefable Moonblast vs. +1 0 HP / 32 SpD Pheromosa: 260-308 (91.8 - 108.8%) -- guaranteed OHKO after Stealth Rock

What the bug beauty does back
+1 224+ SpA Pheromosa Ice Beam vs. 252 HP / 72 SpD Clefable: 166-196 (42.1 - 49.7%) -- guaranteed 3HKO after Leftovers recovery

224+ SpA Pheromosa Focus Blast vs. 252 HP / 72 SpD Clefable: 111-131 (28.1 - 33.2%) -- 92.4% chance to 4HKO after Leftovers recovery
224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 72 SpD Clefable: 175-207 (44.4 - 52.5%) -- guaranteed 3HKO after Leftovers recovery
+1 224+ SpA Pheromosa Focus Blast vs. 252 HP / 72 SpD Clefable: 165-195 (41.8 - 49.4%) -- guaranteed 3HKO after Leftovers recovery
+1 224+ SpA Pheromosa All-Out Pummeling (190 BP) vs. 252 HP / 72 SpD Clefable: 263-309 (66.7 - 78.4%) -- guaranteed 2HKO after Leftovers recovery

Basically the closest it gets is +1 all out pummelling but Phero will rarely get a chance to get a +1 move against clefable twice. The only way it wins is with this

+1 224+ SpA Pheromosa Breakneck Blitz (200 BP) vs. 252 HP / 72 SpD Clefable: 368-434 (93.4 - 110.1%) -- 62.5% chance to OHKO
(368, 373, 377, 381, 386, 390, 394, 399, 403, 407, 412, 416, 420, 425, 429, 434)

This is the only thing that'll kill Clef assuming it hasn't calm minded or isn't one of the rarer higher SPDEF varients.

Aside from Normalium tho (Which renders clef a check) CM clef is as close to a reliable answer as you can get not only switching into most moves but being 1 of the few mons who can actually exploit phero as a set up oppurtunity

 

[Random Passerby]

Reserving Jellicent as a counter. Set incoming.

Focus blast: Zippo

Hyper beam: Zippo

+6 224+ SpA Pheromosa Bug Buzz vs. 248 HP / 0 SpD Jellicent: 315-372 (78.1 - 92.3%) -- guaranteed 2HKO after Leftovers recovery

Yeah...

Edit: I'm currently travelling, so if someone wants this they can take it. I can fill it out within a day, though

Remember to fully finish this post before tonight.

Doublade as a counter.

Tweedledee (Doublade) @ Eviolite
Ability: No Guard
EVs: 248 HP / 64 Atk / 196 SpD
Adamant Nature
- Shadow Sneak
- Iron Head
- Sacred Sword
- Swords Dance

Yes, it's lower-tier, but it's the only thing I know that can actually switch in on basically any Phero. My normal build runs more ATK, but these EVs will let you switch in on an HP Fire(/Ghost/Ground) with rocks up, live a second one, and then kill with Iron Head+Shadow Sneak. Doesn't do much else against the monsters in OU, but another priority user is always good, right?

I don't wanna be the person who says this but what does Doublade do in OU? It would be better if there is some replay or explanation on what it even does.

 

[Random Passerby]

Sorry, I forgot to do this yesterday.
Anyway, you can vote for 2 checks and 2 counters. Voting ends on Friday night. Do not vote for your own set.

Checks:
Shedinja
Gengar
Toxapex
Choice Band Zygarde
Mantine
Mega Pinsir
Ash-Greninja
Mega Venusaur
Tapu Fini
AV Alolan Muk
Clefable

Counters:
Mimikyu
Alolan Marowak
Trick Room Cofragrigus
Jellicent
Doublade
AV Magearna

Note:
1) I moved Shedinja to Checks because Stealth Rock exists.
2) I have no idea what Doublade is supposed to do in OU outside of walling Pheromosa.

 

[Eclipse]

Checks: Mega Pinsir & Gengar
Counters: Jellicent & Alolan Marowak

 

[GnralLao]

Checks:
CB Zygarde and Tapu Fini

Counters:
Mimikyu and Alolan Marowak

 

[Cheryl.]

Checks: Mega Pinsir and Gengar
Counters: Mimikyu and Jellicent