Pelipper @ Heavy-Duty Boots  
Ability: Drizzle  
Tera Type: Water  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 9 Spe  
- Hurricane  
- Defog  
- Roost  
- U-turn  

Swampert-Mega @ Swampertite  
Ability: Swift Swim  
Tera Type: Water  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Earthquake  
- Liquidation  
- Ice Punch  
- Flip Turn  

Ogerpon-Wellspring (F) @ Wellspring Mask  
Ability: Water Absorb  
Tera Type: Water  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Ivy Cudgel  
- Horn Leech  
- Play Rough  
- Swords Dance  

Empoleon @ Heavy-Duty Boots  
Ability: Competitive  
Tera Type: Water  
EVs: 240 HP / 80 Def / 188 SpD  
Sassy Nature  
- Flash Cannon  
- Stealth Rock  
- Roost  
- Flip Turn  

Greninja @ Choice Scarf  
Ability: Protean  
Tera Type: Water  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
- Ice Beam  
- Dark Pulse  
- Sludge Wave  
- U-turn  

Keldeo @ Waterium Z  
Ability: Justified  
Tera Type: Water  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Hydro Pump  
- Secret Sword  
- Vacuum Wave  
- Calm Mind