Mantine @ Life Orb / Leftovers 
Ability: Swift Swim  
EVs: 4 HP / 252 SpA / 252 Spe  
Modest Nature  
IVs: 30 HP / 2 Atk / 30 Def / 30 SpA / 30 SpD  
- Rain Dance  
- Hidden Power [Electric] / Hidden Power [Flying] / Protect
- Surf  
- Ice Beam

Mantine @ Leftovers
Ability: Water Absorb
EVs: 8 HP / 248 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Substitute
- Toxic
- Surf
- Ice Beam