Voltorb @ Lum Berry  
Ability: Static  
EVs: 252 HP / 4 Atk / 252 Spe  
Hasty Nature  
- Hidden Power [Water]  
- Explosion  
- Taunt  
- Rain Dance  

Seaking @ Lum Berry  
Ability: Swift Swim  
EVs: 140 Atk / 252 SpA / 116 Spe  
Mild Nature  
- Hydro Pump  
- Rain Dance  
- Megahorn  
- Hidden Power [Grass]  

Luvdisc @ Mystic Water  
Ability: Swift Swim  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 2 Atk / 30 SpA  
- Surf  
- Ice Beam  
- Hidden Power [Grass]  
- Rain Dance  

Elekid @ Magnet  
Ability: Static  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 2 Atk / 30 SpA  
- Thunder  
- Hidden Power [Grass]  
- Ice Punch  
- Rain Dance  

Horsea @ Miracle Seed  
Ability: Swift Swim  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 2 Atk / 30 SpA  
- Hydro Pump  
- Ice Beam  
- Hidden Power [Grass]  
- Rain Dance  

Grimer @ Leftovers  
Ability: Sticky Hold  
EVs: 252 HP / 4 SpD / 252 Spe  
Calm Nature  
- Sludge Bomb  
- Explosion  
- Rain Dance  
- Giga Drain