Ralts @ Black Sludge  
Ability: Trace  
EVs: 252 Spe  
Naive Nature  
IVs: 2 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Heal Pulse  
- Taunt / Encore
- Magic Coat / Imprison
- Substitute

Gardevoir @ Black Sludge  
Ability: Trace  
EVs: 252 Spe  
Naive Nature  
IVs: 2 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Heal Pulse  
- Taunt / Encore
- Magic Coat / Imprison
- Substitute