Counter that Pokémon

-Avalugg w/Leftovers
Nature: Impish
Ability: Sturdy
EVs: 252 HP, 252 Defense, 4 Attack
Moves: Avalanche, Recover, Rapid Spin, Earthquake

252+ Atk Dragonite Rock Slide vs. 252 HP / 252+ Def Avalugg: 86-102 (21.8 - 25.8%) -- possible 5HKO after Leftovers recovery
4 Atk Avalugg Avalanche vs. 4 HP / 0 Def Multiscale Dragonite: 308-366 (95 - 112.9%) -- 75% chance to OHKO

Ice table wins.

Charizard w/ Charizardite Y.
Nature: Modest.
Ability: Drought.
EVs: 252 Atck, 252 Speed, 4 HP.
Moves: Fire Blast, Air Slash, Solar Beam, Focus Blast.

252+ SpA Mega Charizard Y Focus Blast vs. 252 HP / 0 SpD Avalugg: 614-724 (155.8 - 183.7%) -- guaranteed OHKO

252+ SpA Mega Charizard Y Fire Blast vs. 252 HP / 0 SpD Avalugg in Sun: 1268-1494 (321.8 - 379.1%) -- guaranteed OHKO

4 Atk Avalugg Avalanche vs. 4 HP / 0 Def Mega Charizard Y: 183-216 (61.4 - 72.4%) -- guaranteed 2HKO

Charizard easily brings it down to 1 HP with FB and then kills with Air Slash.

TD said:

Charizard w/ Charizardite Y.
Nature: Modest.
Ability: Drought.
EVs: 252 Atck, 252 Speed, 4 HP.
Moves: Fire Blast, Air Slash, Solar Beam, Focus Blast.

252+ SpA Mega Charizard Y Focus Blast vs. 252 HP / 0 SpD Avalugg: 614-724 (155.8 - 183.7%) -- guaranteed OHKO

252+ SpA Mega Charizard Y Fire Blast vs. 252 HP / 0 SpD Avalugg in Sun: 1268-1494 (321.8 - 379.1%) -- guaranteed OHKO

4 Atk Avalugg Avalanche vs. 4 HP / 0 Def Mega Charizard Y: 183-216 (61.4 - 72.4%) -- guaranteed 2HKO

Charizard easily brings it down to 1 HP with FB and then kills with Air Slash.

Click to expand...

Correction: when Avalugg uses Avalanche as Charizard Y switches in, this is what happens:

4 Atk Avalugg Avalanche vs. 4 HP / 0 Def Mega Charizard Y: 93-109 (31.2 - 36.5%) -- 65.5% chance to 3HKO

That's because Avalanche only doubles in power if Avalugg gets hit by an attack.

As a result, Charizard Y is a check, not a counter, to a full-health Avalugg. While it can switch in to Earthquake and Avalanche on a full-health Avalugg, if it takes a hit from the latter and brings Avalugg down to 1 HP (via Sturdy), Avalugg can KO back with the boosted Avalanche.

Anyway:

Snorlax:

-Body Slam
-Earthquake
-Fire Punch
-Crunch
Nature: Adamant
EVs: 252 Atk/252 SDef/4 Spe
Item:Assault Vest
Ability: Thick Fat

All of Charizard Y's attacks can't even 2HKO Snorlax while Snorlax 2HKOs back with Body Slam.

Machamp (M) @ Choice Band
Trait: No Guard
EVs: 252 HP / 252 Atk / 4 Def
Adamant Nature (+Atk, -SAtk)
- Bullet Punch
- Dynamic Punch
- Ice Punch
- Stone Edge

Could withstand an attack or two from Snorlax, then Dynamic Punch its way.

-Cofagrigus w/Leftovers
Nature: Bold
Ability: Mummy
EVs: 252 HP, 252 Defense, 4 Sp.Attack
Moves: Shadow Ball, Will-o-Wisp, Rest, Knock Off

Can take a few Stone Edges, then burns Machamp (which is easy enough to do because of No Guard). After that, just takes a nap while Machamp's HP slowly decreases.

Houndoom @ Life Orb
Nature: Timid
Ability: Flash Fire
EVs: 4 HP / 252 SpA / 252 Spe
- Dark Pulse
- Fire Blast
- Nasty Plot
- Hidden Power Fighting

Shadow Ball is a 5HKO, Knock Off is an 8HKO, and Houndoom is immune to burn. This is a battle Cofagrigus has no chance in winning.

252 SpA Life Orb Houndoom Dark Pulse vs. 252 HP / 0 SpD Cofagrigus: 291-346 (90.9 - 108.1%) -- 50% chance to OHKO
4 SpA Cofagrigus Shadow Ball vs. 4 HP / 0 SpD Houndoom: 50-59 (17.1 - 20.2%) -- possible 5HKO

Conkeldurr (M) @ Assault Vest
Ability: Guts
EVs: 252 HP / 252 Atk / 4 SDef
Adamant Nature
- Knock Off
- Drain Punch
- Mach Punch
- Ice Punch

Knocks Houndoom down pretty easily with either Mach or Drain Punch.

252 SpA Life Orb Houndoom Fire Blast vs. 252 HP / 4 SpD Assault Vest Conkeldurr: 196-231 (47.3 - 55.7%) -- 79.3% chance to 2HKO

252+ Atk Conkeldurr Drain Punch vs. 4 HP / 0 Def Houndoom: 492-582 (168.4 - 199.3%) -- guaranteed OHKO
252+ Atk Conkeldurr Mach Punch vs. 4 HP / 0 Def Houndoom: 264-312 (90.4 - 106.8%) -- 37.5% chance to OHKO

-Sylveon w/Leftovers
Nature: Bold
Ability: Pixilate
EVs: 252 HP, 244 Defense, 12 Sp.Attack
Moves: Hyper Voice, Wish, Protect, Toxic

Not even Conkeldurr's burly arms and concrete pillars can smash this Sylveon:

252+ Atk Conkeldurr Ice Punch vs. 252 HP / 244+ Def Sylveon: 90-107 (22.8 - 27.1%) -- 52% chance to 4HKO
252+ Atk Conkeldurr Drain Punch vs. 252 HP / 244+ Def Sylveon: 67-80 (17 - 20.3%) -- possible 5HKO

12 SpA Pixilate Sylveon Hyper Voice vs. 252 HP / 4 SpD Assault Vest Conkeldurr: 260-308 (62.8 - 74.3%) -- guaranteed 2HKO

Escavalier @ Assault Vest
Nature: Adamant
Ability: Swarm
EVs: 252 HP / 252 Atk / 4 Sp.Def
- Megahorn
- Iron Head
- Pursuit
- Drill Run

Conkeldurr might not be able to smash the fluttering Sylveon, but Escavalier will.

252+ Atk Escavalier Iron Head vs. 252 HP / 244+ Def Sylveon: 282-332 (71.5 - 84.2%) -- guaranteed 2HKO after Leftovers recovery

12 SpA Pixilate Sylveon Hyper Voice vs. 252 HP / 4 SpD Assault Vest Escavalier: 44-52 (12.7 - 15.1%) -- possible 7HKO

Primeape, Adamant @ Sitrus Berry
Ability: Vital Spirit
EVs: 252 Atk/252 Sp. Def/6 HP
Brick Break, Taunt, U-Turn, Thunderpunch

If there's one thing I don't like, it's the phrase "Nothing can beat this". Vital Spirit nulls your sleep mechanic, while Taunt prevents you from getting too far setup. Throw in a resistance to Dark-type and a Sitrus Berry to keep Primeape in a little longer if need be.

Primeape switches in after the previous pokemon gets put to sleep (likely when you'll set up sub).

252 SpA Darkrai Dark Pulse vs. 6 HP / 252 SpD Primeape: 66-78 (24.2 - 28.6%) -- 99.2% chance to 4HKO

252 Atk Primeape Brick Break vs. 0 HP / 0 Def Darkrai: 234-276 (83.2 - 98.2%) -- guaranteed 2HKO after Leftovers recovery

Reuniclus @ Life Orb
EVs: 252 HP / 252 Def / 4 SpA
Ability: Magic Guard
Nature: Bold

• Calm Mind
• Psychic
• Focus Blast
• Recover

Defeats Primeape with one Psychic attack. Calm Mind's there so that it could gain some special-based stats boost whenever it needs to, and with Recover, it could restore itself whenever its health is down.

4 SpA Life Orb Reuniclus Psychic vs. 4 HP / 252 SpD Primeape: 304-359 (111.7 - 131.9%) -- guaranteed OHKO
252+ Atk Primeape U-turn vs. 252 HP / 252+ Def Reuniclus: 126-150 (29.7 - 35.3%) -- 24% chance to 3HKO

Escavalier @ Assault Vest
Nature: Adamant
Ability: Swarm
EVs: 252 HP / 252 Atk / 4 Sp.Def
- Megahorn
- Iron Head
- Pursuit
- Drill Run

The bug knight strikes again! totally didn't just c/p'd from the last page.

252+ Atk Escavalier Megahorn vs. 252 HP / 252+ Def Reuniclus: 384-452 (90.5 - 106.6%) -- 37.5% chance to OHKO

4 SpA Life Orb Reuniclus Focus Blast vs. 252 HP / 4 SpD Assault Vest Escavalier: 88-104 (25.5 - 30.2%) -- guaranteed 4HKO
4 SpA Life Orb Reuniclus Psychic vs. 252 HP / 4 SpD Assault Vest Escavalier: 49-58 (14.2 - 16.8%) -- possible 6HKO

-Charizard w/Charizardite Y
Nature: Modest
Ability: Blaze--->Drought
EVs: 252 Sp.Attack, 252 Speed, 4 Defense
Moves: Flamethrower, Solar Beam, Dragon Pulse, Focus Blast

That Assault Vest isn't as flame retardant as Escavalier would like:

252+ SpA Charizard Flamethrower vs. 252 HP / 4 SpD Assault Vest Escavalier: 372-436 (108.1 - 126.7%) -- guaranteed OHKO

Chansey (F) @ Evolution Stone
Trait: Natural Cure
EVs: 252 HP / 248 SDef / 8 Spd
Calm Nature (+SDef, -Atk)
- Wish
- Thunder Wave
- Seismic Toss
- Heal Bell

Since this is a special-attacker, it gets completely walled. Then, it cripples Charizard with Thunder Wave and takes it down slowly with Seismic Toss.

252+ SpA Mega Charizard Y Focus Blast vs. 252 HP / 248+ SpD Eviolite Chansey: 158-186 (22.4 - 26.4%) -- 16% chance to 4HKO
Chansey Seismic Toss vs. 4 HP Mega Charizard Y: 100-100 (33.5 - 33.5%) -- guaranteed 3HKO

Ursaring @ Toxic Orb
Ability: Guts
EVs: 252 HP / 252 Atk / 4 Spe
Nature: Adamant
- Close Combat
- Crunch
- Facade
- Protect

It's unfortunate that Physical is the bane of Chansey. It's also unfortunate that Mama-bear here is great at it.

252+ Atk Guts Ursaring Close Combat vs. 252 HP / 0 Def Eviolite Chansey: 1470-1730 (208.8 - 245.7%) -- guaranteed OHKO

Chansey Seismic Toss vs. 252 HP Ursaring: 100-100 (26 - 26%) -- guaranteed 4HKO after toxic damage

Scizor (M) @ Choice Band
Trait: Technician
EVs: 252 HP / 252 Atk / 4 Def
Adamant Nature (+Atk, -SAtk)
- Bullet Punch
- U-turn
- Superpower
- Pursuit

252+ Atk Guts Ursaring Close Combat vs. 252 HP / 4 Def Scizor: 215-253 (62.5 - 73.5%) -- guaranteed 2HKO
252+ Atk Guts Ursaring Facade (140 BP) vs. 252 HP / 4 Def Scizor: 187-221 (54.3 - 64.2%) -- guaranteed 2HKO

252+ Atk Choice Band Scizor Superpower vs. 252 HP / 0 Def Ursaring: 546-644 (142.1 - 167.7%) -- guaranteed OHKO

Zapdos@Leftovers
248 hp / 164 Def / 96 Speed
Bold Nature
Trait: Pressure
- Discharge
- Toxic
- Substitute
- Roost

Walls you indefinitely and resists everything bar Pursuit which doesnt do much lol.

Steelix (M) @Leftovers
252 HP / 220 Atk / 36 Def
Bold Nature
Trait: Sturdy

-Sandstorm
-Curse
-Rock Blast
-Toxic

Resists all attacks by Zapdos, sets up sandstorm to counter leftovers recovery, boosts with curse to guarantee sub destruction with Rock Blast (1 boost with Bold nature breaks a sub with 2 hits and could do a 2HKO with 5 hits). Oh, and because of roost recovery and PP stall, he sneaks in Toxic.


EDIT3: TL;DR: dat big bird got some worm problems.

littlebrother said:

Steelix (M) @Leftovers
252 HP / 220 Atk / 36 Def
Bold Nature
Trait: Sturdy

-Sandstorm
-Curse
-Rock Blast
-Toxic

Resists all attacks by Zapdos, sets up sandstorm to counter leftovers recovery, boosts with curse to guarantee sub destruction with Rock Blast (1 boost with Bold nature breaks a sub with 2 hits and could do a 2HKO with 5 hits). Oh, and because of roost recovery and PP stall, he sneaks in Toxic.

Click to expand...

Why Bold when you use physical attacks? That's pointless. Also, Defense-boosting natures and Curse are redundant; Steelix needs more specially defensive investment to patch up its exposed Special Defense. And an unSTABed Rock Blast isn't that great without Skill Link.

Anyway:

Excadrill:

-Swords Dance
-Earthquake
-Iron Head
-Rock Slide
Nature: Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Life Orb
Ability: Sand Rush

(using the Battle Trozei sprite instead of the B/W sprite or the X/Y model because I can)

Excadrill cares nothing about what Steelix can do; it benefits from Steelix's sandstorm, can take advantage of Curse turns by setting up Swords Dance and takes a pittance from Rock Blast.

Suicune @ Leftovers
Trait: Pressure
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature (+Def, -Atk)

• Calm Mind
• Scald
• Rest
• Sleep Talk

4 SpA Suicune Scald vs. 0 HP / 0 SpD Excadrill: 224-266 (62 - 73.6%) -- guaranteed 2HKO

252+ Atk Life Orb Mold Breaker Excadrill Earthquake vs. 252 HP / 252+ Def Suicune: 157-187 (38.8 - 46.2%) -- guaranteed 3HKO after Leftovers recovery
252+ Atk Life Orb Mold Breaker Excadrill Rock Slide vs. 252 HP / 252+ Def Suicune: 79-94 (19.5 - 23.2%) -- possible 6HKO after Leftovers recovery