Regieleki @ Altarianite  
Ability: Transistor  
EVs: 252 Atk / 224 SpA / 32 Spe  
Naughty Nature  
- Extreme Speed  
- Explosion  
- Rapid Spin  
- Volt Switch  

Gourgeist-Small @ Lucarionite  
Ability: Frisk  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Poltergeist  
- Power Whip  
- Rock Slide  
- Shadow Sneak  

Milotic @ Sablenite  
Ability: Marvel Scale  
EVs: 252 HP / 216 Def / 40 SpD  
Bold Nature  
- Scald  
- Flip Turn  
- Recover  
- Haze  

Magearna @ Manectite  
Ability: Soul-Heart  
EVs: 252 HP / 252 Def / 4 SpA  
Bold Nature  
IVs: 0 Atk  
- Fleur Cannon  
- Volt Switch  
- Aura Sphere  
- Pain Split  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 116 Atk / 80 Def / 60 Spe  
Adamant Nature  
- Earthquake  
- Stone Edge  
- Stealth Rock  
- Swords Dance  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 208 Def / 52 SpD  
Impish Nature  
- Sacred Fire  
- Brave Bird  
- Defog  
- Whirlwind