Mewtwo @ Light Clay  
Ability: Unnerve  
EVs: 248 HP / 8 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Reflect  
- Light Screen  
- Taunt  
- Thunder Wave  

Rayquaza @ Life Orb  
Ability: Air Lock  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Ascent  
- Extreme Speed  
- Earthquake  
- Swords Dance  

Groudon @ Lum Berry  
Ability: Drought  
EVs: 40 HP / 252 Atk / 216 Spe  
Adamant Nature  
- Precipice Blades  
- Stone Edge  
- Rock Polish  
- Swords Dance  

Garchomp @ Haban Berry  
Ability: Rough Skin  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Claw  
- Earthquake  
- Stone Edge  
- Swords Dance  

Cloyster @ King's Rock  
Ability: Skill Link  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Icicle Spear  
- Rock Blast  
- Ice Shard  
- Shell Smash  

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Dragon Pulse  
- Thunder  
- Calm Mind