Dialga @ Leftovers  
Ability: Corrosion  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Toxic Thread  
- Baneful Bunker  
- Core Enforcer  
- Gastro Acid  

Lunala @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Moongeist Beam  
- Roost  
- Toxic Spikes  
- Baneful Bunker  

Muk-Alola @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Spectral Thief  
- Baton Pass  
- Defog  
- Recover  

Gengar-Mega @ Earth Plate  
Ability: Merciless  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sludge Wave  
- Moongeist Beam  
- Shell Smash  
- Judgment  

Gyarados-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Gastro Acid  
- Heal Order  
- Parting Shot  
- Pursuit  

Groudon-Primal @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Copycat  
- Haze  
- Shore Up  
- Thousand Arrows