Voltorb @ Magnet  
Ability: Static  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
- Rain Dance  
- Explosion  
- Thunder  
- Taunt  

Seaking @ Lum Berry  
Ability: Swift Swim  
EVs: 4 Atk / 252 SpA / 252 Spe  
Mild Nature  
- Hydro Pump  
- Ice Beam  
- Megahorn  
- Rain Dance  

Horsea @ Mystic Water  
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 Atk / 252 SpD  
Careful Nature  
- Rest  
- Curse  
- Sleep Talk  
- Sludge Bomb  

Taillow @ Choice Band  
Ability: Guts  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Double-Edge  
- Aerial Ace  
- Hidden Power [Ground]  
- Quick Attack  

Cubone @ Thick Club  
Ability: Rock Head  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Double-Edge  
- Bonemerang  
- Rock Slide  
- Substitute