Arceus-Bug @ Toxic Orb  
Ability: Poison Heal  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- King's Shield  
- Revelation Dance  
- Moongeist Beam  

Mewtwo-Mega-X @ Sitrus Berry  
Ability: Unburden  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Belly Drum  
- Sunsteel Strike  
- Photon Geyser  
- Extreme Speed  

Rayquaza-Mega @ Life Orb  
Ability: Triage  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Tail Glow  
- Substitute  
- Moongeist Beam  
- Oblivion Wing  

Audino-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- King's Shield  
- Baton Pass  
- Wish  
- Whirlwind  

Slowbro-Mega @ Shed Shell  
Ability: Fur Coat  
EVs: 248 HP / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Will-O-Wisp  
- King's Shield  
- Slack Off  
- Defog  

Gyarados-Mega @ Gyaradosite  
Ability: Prankster  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Roost  
- Me First  
- Pursuit  
- Haze