Palkia @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Origin Pulse  
- Whirlpool  
- Strength Sap  

Groudon @ Soft Sand  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Parting Shot  
- Haze  
- Precipice Blades  
- Shore Up  

Giratina @ Griseous Orb  
Ability: Magic Bounce  
EVs: 252 HP / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Teleport  
- Corrosive Gas  
- Purify  
- Soft-Boiled  

Eternatus @ Wide Lens  
Ability: Compound Eyes  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Zap Cannon  
- Inferno  
- Magma Storm  
- Recover  

Zygarde-Complete @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Coil  
- Precipice Blades  
- Bolt Strike  
- Will-O-Wisp  

Zacian @ Pixie Plate  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Coil  
- Mega Kick  
- Stone Edge  
- Strength Sap