w/ coilpass (Arceus) @ Mental Herb  
Ability: Neutralizing Gas  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Magic Room  
- Shell Smash  
- Population Bomb  
- Power Trip  

Arceus-Dark @ Mental Herb  
Ability: Neutralizing Gas  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Magic Room  
- Shell Smash  
- Power Trip  
- Gigaton Hammer  

Item remover (Arceus-Dark) @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Poison  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Taunt  
- Magic Room  
- Victory Dance  
- Knock Off  

Arceus-Dark @ Leftovers  
Ability: Neutralizing Gas  
Tera Type: Ghost  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Taunt  
- Victory Dance  
- Knock Off  
- Corrosive Gas  

Groudon-Primal @ Mental Herb / Safety Goggles / Leppa Berry  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Spore / Taunt  
- Corrosive Gas / Magic Room  
- Shell Smash  
- V-create  

Groudon-Primal @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Taunt  
- Magic Room  
- Shell Smash  
- V-create  

Groudon-Primal @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Taunt  
- Magic Room  
- Victory Dance  
- Bitter Blade  

Groudon-Primal @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Magic Room  
- Shell Smash  
- V-create  
- Revelation Dance  

Hoopa-Unbound @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Magic Room  
- Shell Smash  
- Stored Power  
- Power Trip  

Kartana @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Ghost  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Spore  
- Magic Room  
- Shell Smash  
- Gigaton Hammer  

Kartana @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Ghost  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Taunt  
- Magic Room  
- Victory Dance  
- Gigaton Hammer  

ez improof sporer (Kyogre-Primal) @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Magic Room  
- Shell Smash  
- Water Spout  
- Spore  

Kyurem-Black @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Taunt  
- Magic Room  
- Shell Smash  
- Glacial Lance  

ohko caly w/ bug (Mewtwo-Mega-Y) @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Bug  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Magic Room  
- Shell Smash  
- Stored Power  
- Megahorn  

Necrozma-Ultra @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Dragon  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
- Magic Room  
- Shell Smash  
- Stored Power  
- Glaive Rush  

Rayquaza-Mega @ Heavy-Duty Boots  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Magic Room  
- Shell Smash  
- Dragon Energy  
- Pyro Ball  

Rayquaza-Mega @ Heavy-Duty Boots  
Ability: Neutralizing Gas  
Tera Type: Fire  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Magic Room  
- Shell Smash  
- Dragon Energy  
- Torch Song  

Slaking @ Mental Herb  
Ability: Neutralizing Gas  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Magic Room  
- Shell Smash  
- Power Trip  
- Extreme Speed