Arceus @ Fist Plate  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Taunt  
- Shell Smash  
- Moongeist Beam  
- Judgment  

Xerneas @ Leppa Berry  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Mild Nature  
IVs: 0 Def / 0 SpD  
- Shell Smash  
- Searing Sunraze Smash  
- Menacing Moonraze Maelstrom  
- Moonblast  

Deoxys-Speed @ Focus Sash  
Ability: No Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sheer Cold  
- Taunt  
- Stealth Rock  
- Sticky Web  

Mewtwo-Mega-X @ Leppa Berry  
Ability: Contrary  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Superpower  
- Light That Burns the Sky  
- Sunsteel Strike  
- Menacing Moonraze Maelstrom  

Gengar-Mega @ Focus Sash  
Ability: No Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Fissure  
- Zap Cannon  
- Taunt  
- Toxic Spikes  

Regigigas @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Extreme Speed  
- Pursuit  
- Searing Sunraze Smash