Groudon @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Thousand Arrows  
- Shift Gear  
- Will-O-Wisp  
- Baneful Bunker  

Zygarde-Complete @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Core Enforcer  
- Spectral Thief  
- Nuzzle  
- U-turn  

Ho-Oh @ Life Orb
Ability: Magic Guard
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Flare Blitz / Fire Lash
- Spectral Thief  
- Recover  
- Rapid Spin  

Giratina @ Griseous Orb / Heavy-Duty Boots 
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Core Enforcer  
- Spectral Thief  
- Slack Off  
- Knock Off  

Pheromosa @ Life Orb  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- U-turn  
- High Jump Kick  
- Knock Off  
- Glacial Lance  

Zamazenta-Crowned @ Rusted Shield / Leftovers
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Haze  
- Corrosive Gas / Entrainment
- Roost  
- Anchor Shot