Mewtwo-Mega-Y @ Choice Specs  
Ability: Shadow Tag  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Trick  
- Light That Burns the Sky  
- Fleur Cannon  
- Water Shuriken