Magearna @ Ghostium Z  
Ability: Soul-Heart  
EVs: 252 HP / 4 Def / 252 SpA  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Dazzling Gleam  
- Shadow Ball  
- Trick Room  
- Protect  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 252 HP / 172 Def / 84 SpA  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Water Spout  
- Scald  
- Ice Beam  
- Protect  

Rayquaza-Mega @ Focus Sash  
Ability: Delta Stream  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Dragon Ascent  
- V-create  
- Extreme Speed  
- Protect  

Lunala @ Safety Goggles  
Ability: Shadow Shield  
EVs: 252 HP / 252 SpA / 4 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Moongeist Beam  
- Psyshock  
- Trick Room  
- Wide Guard  

Amoonguss @ Focus Sash  
Ability: Regenerator  
EVs: 252 HP / 180 Def / 76 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Clear Smog  
- Rage Powder  
- Spore  
- Protect  

Arceus @ Mago Berry  
Ability: Multitype  
EVs: 128 HP / 252 Atk / 128 Spe  
Adamant Nature  
- Extreme Speed  
- Shadow Claw  
- Swords Dance  
- Recover