Giratina @ Heavy-Duty Boots  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Defog  
- Teleport  
- Core Enforcer  
- Shore Up  

Regigigas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Nuzzle  
- Facade  
- Spikes  
- Flip Turn  

Zamazenta-Crowned @ Leftovers  
Ability: Primordial Sea  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Anchor Shot  
- Thunderous Kick  
- Shore Up  
- Spectral Thief  

Eternatus @ Flame Orb  
Ability: Flare Boost  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Strength Sap  
- Core Enforcer  
- Blue Flare  

Ho-Oh @ Heavy-Duty Boots  
Ability: Desolate Land  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- V-create  
- Nuzzle  
- Recover  
- Stealth Rock  

Xerneas @ Pixie Plate  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Rapid Spin  
- Strength Sap  
- Boomburst  
- Extreme Speed