Mewtwo-Mega-X @ Expert Belt  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Pursuit  
- Low Kick  
- Fire Lash  
- Thousand Arrows  

Gengar-Mega @ Choice Scarf  
Ability: Parental Bond  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Bug Buzz  
- Sludge Wave  
- Ice Beam  
- Moongeist Beam  

Arceus @ Darkinium Z  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Heal Order  
- Stealth Rock  
- Lava Plume  
- Parting Shot  

Audino-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk / 0 Spe  
- Soft-Boiled  
- Defog  
- King's Shield  
- U-turn  

Mewtwo-Mega-X @ Life Orb  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Photon Geyser  
- First Impression  
- Ice Hammer  
- Sunsteel Strike  

Steelix-Mega @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Shore Up  
- Haze  
- Thousand Waves  
- Misty Terrain