Slowking @ Black Sludge  
Ability: Oblivious  
Tera Type: Dark / Ghost
EVs: 252 Spe  
Hasty Nature  
IVs: 4 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Substitute  
- Belly Drum  
- Chilly Reception  
- Trick Room / Thunder Wave / Imprison / Heal Pulse / Trick / Curse