Masquerain @ Black Sludge  
Ability: Unnerve  
Tera Type: Dark  
EVs: 252 Spe  
Naive Nature  
IVs: 6 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Sticky Web  
- Substitute  
- Baton Pass  
- Whirlwind / Tailwind / Stun Spore / Agility