Arceus @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Encore  
- Recover  
- Destiny Bond  
- Stealth Rock  

Mewtwo-Mega-X @ Focus Sash  
Ability: Huge Power  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Petal Blizzard  
- Play Rough  
- Sacred Fire  
- Thousand Arrows  

Slaking @ Lum Berry  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 8 SpD  
Brave Nature  
IVs: 0 Spe  
- Fake Out  
- Parting Shot  
- Defog  
- Recover  

Rayquaza-Mega @ Life Orb  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Oblivion Wing  
- Substitute  
- Taunt  

Rayquaza-Mega @ Choice Specs  
Ability: Gale Wings  
EVs: 248 HP / 252 SpA / 8 SpD  
Modest Nature  
IVs: 0 Atk  
- Chatter  
- Oblivion Wing  
- Trick  
- Taunt  

Gengar-Mega @ Spooky Plate  
Ability: Wonder Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Shell Smash  
- Judgment  
- Secret Sword  
- Sludge Bomb