Mewtwo @ Life Orb / Expert Belt / Colbur Berry
Ability: Pressure  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Psystrike  
- Fire Blast
- Ice Beam / Thunder / Hurricane

Mewtwo @ Leftovers / Heavy-Duty Boots
Ability: Pressure  
EVs: 248 HP / 20 Def / 56 SpA / 184 Spe  
Timid Nature  
IVs: 0 Atk  
- Ice Beam / Psystrike  
- Recover  
- Taunt  
- Will-O-Wisp