Quagsire @ Leftovers  
Ability: Unaware  
Shiny: Yes  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Scald   
- Recover  
- Haze

Other viable moves:
- Toxic (by far the most common)
- Earthquake
- Protect
- Curse + Earthquake and replace Haze