Regigigas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Dragon Dance  
- Facade  
- Knock Off  
- Avalanche  

Groudon @ Soft Sand  
Ability: Mold Breaker  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Spikes  
- Thousand Arrows  
- Glare  
- Strength Sap  

Zamazenta-Crowned @ Rusted Shield  
Ability: Ice Scales  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Anchor Shot  
- Thunderous Kick  
- Topsy-Turvy  
- Soft-Boiled  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Quiver Dance  
- Moonblast  
- Rapid Spin  
- Strength Sap  

Giratina @ Leftovers  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Teleport  
- Spectral Thief  
- Core Enforcer  
- Slack Off  

Chansey (F) @ Eviolite  
Ability: Imposter  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
IVs: 0 Atk  
- Perish Song  
- Haze  
- Jungle Healing  
- Recover