Garchomp @ Custap Berry  
Ability: Rough Skin  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Endure  
- Swords Dance  
- Outrage  
- Earthquake  

Registeel @ Leftovers  
Ability: Clear Body  
EVs: 252 HP / 92 Def / 164 SpD  
Careful Nature  
IVs: 0 Atk  
- Body Press  
- Iron Defense  
- Amnesia  
- Rest  

Tapu Fini @ Sitrus Berry
Ability: Misty Surge
EVs: 248 HP / 112 SpA / 20 SpD / 128 Spe
Modest Nature
IVs: 0 Atk
- Calm Mind
- Taunt
- Moonblast
- Surf