Mewtwo-Mega-X @ Mental Herb  
Ability: Huge Power  
Tera Type: Ghost  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Victory Dance  
- Corrosive Gas  
- Photon Geyser  
- Sacred Sword  

Arceus-Flying @ Sky Plate  
Ability: Neutralizing Gas  
Tera Type: Grass  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Corrosive Gas  
- Shell Smash  
- Judgment  
- Spore  

Sableye-Mega @ Ability Shield  
Ability: Magic Bounce  
Tera Type: Water  
EVs: 248 HP / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Tidy Up  
- Curse  
- Baton Pass  
- Recover  

Dondozo @ Ability Shield  
Ability: Wonder Guard  
Tera Type: Ghost  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Perish Song  
- Surging Strikes  
- Revival Blessing  
- Shore Up  

Regieleki @ Leppa Berry  
Ability: Wonder Guard  
Tera Type: Grass  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 30 HP / 0 Atk  
- Taunt  
- Shed Tail  
- Revival Blessing  
- Recover  

Eternatus @ Choice Scarf  
Ability: Regenerator  
Tera Type: Ghost  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Trick  
- Shed Tail  
- Clanging Scales  
- Court Change