Dunsparce @ Leftovers  
Ability: Serene Grace  
EVs: 252 HP / 4 Atk / 252 Def or 252 HP / 4 Atk / 252 SpD
Impish or Careful Nature  
- Stealth Rock  
- Roost  
- Toxic / Glare   
- Body Slam / Headbutt

Other options: Coil / Roost / Glare or Body Slam / Headbutt or Bite