Slaking @ Lum Berry  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Sunsteel Strike  
- Extreme Evoboost  

Mewtwo-Mega-X @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Photon Geyser  
- First Impression  
- Searing Shot  
- Let's Snuggle Forever  

Mewtwo-Mega-X @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Light That Burns the Sky  
- Close Combat  
- Menacing Moonraze Maelstrom  
- Sunsteel Strike  

Mewtwo-Mega-X @ Focus Sash  
Ability: No Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Sunsteel Strike  
- Megahorn  
- Shell Smash  
- Fissure  

Arceus @ Mental Herb  
Ability: Arena Trap  
EVs: 248 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Memento  
- Taunt  
- Spikes  
- Sticky Web  

Blissey (F) @ Wiki Berry  
Ability: Innards Out  
EVs: 252 HP / 252 SpD  
Gentle Nature  
IVs: 0 Atk / 11 Def / 0 Spe  
- Magic Coat  
- Defog  
- Baton Pass  
- Whirlwind