Mewtwo-Mega-Y @ Life Orb  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Light of Ruin  
- Volt Tackle  
- Seed Flare  
- Earth Power  

Regigigas @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Rapid Spin  
- Nuzzle  
- Spectral Thief  
- U-turn  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Sunsteel Strike  
- Precipice Blades  
- Glacial Lance  
- Strength Sap  

Arceus-Water @ Heavy-Duty Boots  
Ability: Fur Coat  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Scald  
- Entrainment  
- Shore Up  
- Teleport  

Swampert-Mega @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Thousand Waves  
- Glare  
- Spikes  
- Baneful Bunker  

Ho-Oh @ Heavy-Duty Boots  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- V-create  
- Copycat  
- Haze  
- Shore Up