Audino-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Spectral Thief  
- Defog  
- Roost  
- Parting Shot  

Groudon-Primal @ Air Balloon  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Relaxed Nature  
- Spectral Thief  
- U-turn  
- Heal Order  
- Lava Plume  

Groudon-Primal @ Grassium Z  
Ability: Arena Trap  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Magic Coat  
- Taunt  
- Strength Sap  
- Spikes  

Mewtwo-Mega-Y @ Focus Sash  
Ability: Protean  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Mild Nature  
- Shell Smash  
- Lovely Kiss  
- Moonblast  
- Sunsteel Strike  

Mewtwo-Mega-X @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Photon Geyser  
- Sunsteel Strike  
- Stealth Rock  

Chansey (F) @ Aguav Berry  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpD / 252 Spe  
Serious Nature  
IVs: 0 Def  
- Heart Swap  
- Toxic Spikes  
- Roost  
- U-turn