Groudon-Primal @ Leftovers  
Ability: Stakeout  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Yawn  
- Sacred Fire  
- Precipice Blades  
- Bolt Strike  

Audino-Mega @ Leftovers  
Ability: Magic Bounce  
Level: 99  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- U-turn  
- Will-O-Wisp  
- Stealth Rock  
- Spiky Shield  

Ho-Oh @ Safety Goggles  
Ability: Unaware  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
- Spectral Thief  
- Milk Drink  
- Revelation Dance  
- Core Enforcer  

Rayquaza-Mega @ Choice Specs  
Ability: Tinted Lens  
Shiny: Yes  
Happiness: 0  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Secret Sword  
- Moongeist Beam  
- Core Enforcer  

Arceus @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Boomburst  
- Core Enforcer  
- Imprison  
- Quiver Dance  

Yveltal @ Leftovers  
Ability: Berserk  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Quiet Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Dark Pulse  
- Shore Up  
- Searing Shot