Mewtwo-Mega-Y @ Focus Sash  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Shell Smash  
- Psystrike  
- Moonblast  
- Searing Shot  

Blissey (F) @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe
- Glare  
- Recover  
- Magic Coat  
- Parting Shot  

Beedrill-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Stealth Rock  
- Aromatherapy  
- Defog  
- U-turn  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Substitute  
- Recover  
- Curse  
- Baton Pass  

Mewtwo-Mega-X @ Shed Shell  
Ability: Pure Power  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Bolt Strike  
- Gear Grind  
- Sacred Fire  
- Thousand Arrows  

Tyranitar-Mega @ Lum Berry  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 8 Def  
Adamant Nature  
- Pursuit  
- Sucker Punch  
- Drain Punch 
- Play Rough