Counter that Pokémon! SM v.2

Venusaur @ Venusaurite
Ability: Chlorophyll
EVs: 248 HP / 88 Def / 156 SpD / 16 Spe
Calm Nature
- Giga Drain
- Sludge Bomb
- Synthesis
- Hidden Power Fire

Jirachi @ Choice Band
Ability: Serene Grace
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Iron Head
- Fire Punch
- Heart Stamp
- Ice Punch

Volcanion @ Choice Specs
Ability: Water Absorb
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
- Steam Eruption
- Fire Blast
- Hidden Power Electric
- Sludge Wave

Dragalge @ Choice Specs
Ability: Adaptability
EVs: 204 HP / 252 SpA / 52 Spe
Modest Nature
- Draco Meteor
- Sludge Wave
- Hidden Power Fire
- Focus Blast

Dragonite @ Assault Vest
Ability: Multiscale
EVs: 4 HP / 252 Atk / 252 SpD
Careful Nature
- Outrage
- Earthquake
- Fire Punch
- Extreme Speed

Avalugg @ Leftovers
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 Atk
Impish Nature
- Avalanche
- Stone Edge
- Gyro Ball
- Eartquake

Wormadam-Trash @ Leftovers
Ability: Overcoat
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Toxic
- Protect
- Flash Cannon
- Hidden Power Ground

Charizard @ Charizardite Y
Ability: Blaze
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Flamethrower
- Solar Beam
- Focus Blast
- Roost

Aerodactyl @ Aerodactylite
Ability: Unnerve
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stone Edge
- Wing Attack
- Earthquake
- Pursuit

Swampert-Mega @ Swampertite
Ability: Swift Swim
EVs: 252 Atk / 252 Spe / 4 SpD
Adamant Nature
-Waterfall
-Earthquake
-Ice Punch
-Superpower

252 Atk Tough Claws Aerodactyl-Mega Wing Attack vs. 0 HP / 0 Def Swampert-Mega: 121-144 (35.4 - 42.2%) -- guaranteed 3HKO
252+ Atk Swampert-Mega Waterfall vs. 0 HP / 0 Def Aerodactyl-Mega: 366-432 (121.5 - 143.5%) -- guaranteed OHKO

Scizor @ Scizorite
Ability: Light Metal
EVs: 252 HP / 108 Atk / 148 SpD
Brave Nature
- Bullet Punch
- Roost
- U-turn
- Swords Dance

Heatran @ Choice Scarf
Ability: Flash Fire
EVs: 28 HP / 252 SpA / 228 Spe
Timid Nature
- Overheat
- Flash Cannon
- Earth Power
- Stone Edge

Bibarel @ Chesto Berry
Ability: Simple
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Curse
- Waterfall
- Quick Attack
- Rest

Conkeldurr @Assault Vest
Guts
EV: 252 Atk/ 248 HP/ 8 SpD
Adamant
- Mach Punch
- Drain Punch
- Ice Punch
- Knock Off

Calcs:

252+ Atk Conkeldurr Drain Punch vs. 252 HP / 0 Def Bibarel: 224-266 (120.4 - 143%) -- guaranteed OHKO
4 Atk Bibarel Waterfall vs. 248 HP / 0 Def Conkeldurr: 42-51 (19.9 - 24.1%) -- possible 5HKO

after 1 curse:
252+ Atk Conkeldurr Drain Punch vs. +1 252 HP / 0 Def Bibarel: 152-180 (81.7 - 96.7%) -- guaranteed 2HKO

Azumarill @ Choice Band
Ability: Huge Power
EVs: 92 HP / 252 Atk / 164 Spe
Adamant Nature
- Play Rough
- Aqua Jet
- Waterfall
- Knock Off

Gengar @ Choice Specs
Ability: Cursed Body
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Wave
- Focus Blast
- Trick

Aaron said:

Gigalith @ Assault Vest
Ability: Sand Stream
EVs: 228 HP / 180 Atk / 92 Def
Adamant Nature
- Earthquake
- Heavy Slam
- Stone Edge
- Superpower

Click to expand...

252 SpA Choice Specs Gengar Focus Blast vs. 228 HP / 0 SpD Assault Vest Gigalith in Sand: 210-248 (57 - 67.3%) -- guaranteed 2HKO

it can't switch into this :<

Skarmory @ Leftovers
Ability: Sturdy
EVs: 248 HP / 252 Def / 8 SpD
Impish Nature
-Iron Head
-Roost
-Stealth Rock
-Defog

I didn't want to be that guy, but....

Chansey @ Eviolite
Ability: Natural Cure
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
- Seismic Toss
- Toxic
- Stealth Rock
- Soft-Boiled

Lucario @ Lucarionite
Ability: Justified
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Close Combat
- Bullet Punch
- Iron Tail