Mewtwo-Mega-Y @ Life Orb  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Moongeist Beam  
- Tail Glow  
- Taunt  

Deoxys-Attack @ Focus Sash  
Ability: Magic Guard  
EVs: 252 SpA / 252 Spe  
Naive Nature  
IVs: 0 HP / 0 Atk / 0 Def / 0 SpD  
- Mind Blown  
- Light of Ruin  
- Shell Smash  
- Taunt  

Necrozma-Ultra @ Focus Sash  
Ability: Dazzling  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Bolt Strike  
- Close Combat  
- Taunt  
- Shell Smash  

Rayquaza-Mega @ Life Orb  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Moongeist Beam  
- Tail Glow  
- Taunt  

Groudon-Primal @ Life Orb  
Ability: Refrigerate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Ice Hammer  
- Close Combat  
- Extreme Speed  
- Shell Smash  

Arceus @ Leftovers  
Ability: Mold Breaker  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Stealth Rock  
- Spikes  
- Spore