Giratina @ Griseous Orb  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Teleport  
- Knock Off  
- Worry Seed  
- Soft-Boiled  

Tapu Fini @ Heavy-Duty Boots  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Parting Shot  
- Haze  
- Scald  
- Soft-Boiled  

Eternatus @ Choice Specs  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dragon Energy  
- Eruption  
- Nuzzle  
- Volt Switch  

Palkia @ Lustrous Orb  
Ability: Adaptability  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Water Spout  
- Dragon Energy  
- Strength Sap  

Heatran @ Leftovers  
Ability: Desolate Land  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Sassy Nature  
- Eruption  
- Anchor Shot  
- Rapid Spin  
- Strength Sap  

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