Lucario-Mega @ Focus Sash  
Ability: No Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Fissure  
- Searing Sunraze Smash  
- Bolt Strike  
- Shell Smash  

Swampert-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 30 HP / 0 Spe  
- Thousand Waves  
- Defog  
- Strength Sap  
- U-turn  

Arceus @ Fist Plate  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 30 HP / 0 Atk  
- Judgment  
- Moongeist Beam  
- Shell Smash  
- Taunt  

Mewtwo-Mega-X @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 69 SpA / 252 SpD / 252 Spe  
Adamant Nature  
IVs: 30 HP  
- Sunsteel Strike  
- V-create  
- Shadow Sneak  
- Mach Punch  

Blissey (F) @ Grassium Z  
Ability: Innards Out  
EVs: 252 HP / 252 SpD  
Gentle Nature  
IVs: 0 Atk / 0 Def  
- Spiky Shield  
- Baton Pass  
- Soft-Boiled  
- Aromatherapy  

Mewtwo-Mega-Y @ Lum Berry  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Hasty Nature  
IVs: 0 Def / 0 SpD  
- Light That Burns the Sky  
- Close Combat  
- Stealth Rock  
- Sticky Web