Xerneas @ Iron Plate  
Ability: Wonder Guard  
EVs: 48 HP / 212 SpA / 248 Spe  
Modest Nature  
IVs: 0 Atk  
- Shell Smash  
- Moonblast  
- Freeze-Dry  
- Judgment  

Mewtwo-Mega-X @ Shed Shell  
Ability: Huge Power  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Sacred Fire  
- Play Rough  
- Close Combat  
- Shadow Sneak  

Mewtwo-Mega-X @ Life Orb  
Ability: Huge Power  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Gear Grind  
- Water Shuriken  
- Extreme Speed  
- Fusion Bolt  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Encore  
- Haze  
- Curse  
- Recover  

Groudon-Primal @ Choice Scarf  
Ability: Shadow Tag  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- V-create  
- Thousand Arrows  
- Trick  
- Fusion Bolt  

Arceus @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Parting Shot  
- Nuzzle  
- Recover  
- Defog