Whimsicott @ Pecha Berry / Toxic Orb / Black Sludge
Ability: Prankster  
EVs: 252 Spe  
Naive Nature  
IVs: 0 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Taunt  
- Encore  
- Substitute  
- Switcheroo / Defog / Stun Spore / Tailwind 

Cottonee @ Black Sludge
Ability: Prankster  
EVs: 252 Spe  
Naive Nature  
IVs: 0 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Taunt  
- Encore  
- Substitute  
- Defog / Stun Spore / Tailwind / Knock Off