Mewtwo-Mega-Y @ Lum Berry  
Ability: No Guard  
Shiny: Yes  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Zap Cannon  
- Magma Storm  
- Blizzard  
- Psystrike  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Moonblast  
- Spikes  
- Quiver Dance  
- Magma Storm  

Chansey @ Lucky Punch  
Ability: Imposter  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Soft-Boiled  
- Heal Bell  
- Anchor Shot  
- Teleport  

Arceus-Water @ Earth Plate  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Impish Nature  
IVs: 0 Atk  
- Scald  
- Judgment  
- Shore Up  
- Topsy-Turvy  

Groudon @ Red Orb  
Ability: Intimidate  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Shift Gear  
- Strength Sap  
- Solar Blade  
- V-create  

Yveltal @ Heavy-Duty Boots  
Ability: Prankster  
Shiny: Yes  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Shore Up  
- Haze  
- Revelation Dance  
- Rapid Spin