Mewtwo @ Colbur Berry  
Ability: Pressure  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Fire Blast  
- Ice Beam  
- Calm Mind  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Precipice Blades  
- Eruption  
- Rock Tomb  
- Stealth Rock  

Xerneas @ Choice Scarf  
Ability: Fairy Aura  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Aromatherapy  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Earthquake  
- Stone Edge  
- Ice Beam  
- Swords Dance  

Gengar-Mega @ Gengarite  
Ability: Shadow Tag  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Sludge Wave  
- Taunt  
- Destiny Bond  

Gyarados @ Groundium Z  
Ability: Moxie  
EVs: 88 HP / 236 Atk / 8 SpD / 176 Spe  
Jolly Nature  
- Waterfall  
- Earthquake  
- Dragon Dance  
- Substitute