Mewtwo-Mega-Y @ Choice Scarf  
Ability: No Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Trick  
- Sludge Wave  
- Sheer Cold  
- Bug Buzz  

Rayquaza-Mega @ Mental Herb  
Ability: Mold Breaker  
EVs: 208 HP / 252 SpA / 48 Spe  
Modest Nature  
IVs: 0 Atk  
- Shell Smash  
- Oblivion Wing  
- Substitute  
- Dark Void  

Groudon-Primal @ Safety Goggles  
Ability: Mold Breaker  
EVs: 248 HP / 252 Atk / 8 Spe  
Adamant Nature  
- Thousand Waves  
- Stealth Rock  
- Taunt  
- Shell Smash  

Regigigas @ Life Orb  
Ability: Shadow Tag  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Taunt  
- Spikes  

Registeel @ Safety Goggles  
Ability: Magic Guard  
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
IVs: 0 Atk  
- Magic Coat  
- Perish Song  
- Recover  
- Infestation  

Chansey (F) @ Eviolite  
Ability: Imposter  
EVs: 248 HP / 8 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Perish Song  
- Roost  
- Magic Coat  
- Parting Shot