Toxapex @ Black Sludge  
Ability: Regenerator  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Scald  
- Toxic Spikes  
- Recover  
- Haze  

Muk-Alola @ Assault Vest  
Ability: Poison Touch  
EVs: 252 HP / 80 Atk / 28 Def / 148 SpD  
Brave Nature  
- Pursuit  
- Knock Off  
- Shadow Sneak  
- Clear Smog  

Crobat @ Black Sludge  
Ability: Infiltrator  
EVs: 252 HP / 4 Def / 252 Spe  
Jolly Nature  
- U-turn  
- Defog  
- Roost  
- Brave Bird  

Gengar @ Gengarite  
Ability: Cursed Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Sludge Wave  
- Focus Blast  
- Taunt  

Naganadel @ Dragonium Z  
Ability: Beast Boost  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Sludge Wave  
- Draco Meteor  
- Fire Blast  

Arceus-Poison @ Poisonium Z  
Ability: Multitype  
EVs: 232 HP / 4 Atk / 252 Spe  
Jolly Nature  
- Poison Jab  
- Will-O-Wisp  
- Recover  
- Stealth Rock