Arceus @ Chople Berry  
Ability: Multitype  
EVs: 240 HP / 252 Atk / 16 Spe  
Adamant Nature  
- Swords Dance  
- Extreme Speed  
- Shadow Claw  
- Earthquake  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 72 HP / 252 SpA / 100 SpD / 84 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Thunder  
- Focus Blast  

Shaymin-Sky @ Normalium Z  
Ability: Serene Grace  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Seed Flare  
- Air Slash  
- Earth Power  
- Celebrate  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Stealth Rock  
- Precipice Blades  
- Rock Slide  
- Fire Punch  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Close Combat  
- Spectral Thief  
- Shadow Sneak  
- Rock Tomb  

Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Unnerve  
EVs: 8 HP / 80 Def / 228 SpA / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Ice Beam  
- Fire Blast  
- Calm Mind