Water Gym

Politoed @ Eject Button
Ability: Drizzle
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
- Scald
- Ice Beam
- Encore
- Perish Song

Manaphy @ Leftovers
Ability: Hydration
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Rain Dance
- Energy Ball
- Scald
- Tail Glow

Kingdra @ Choice Specs
Ability: Swift Swim
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Surf
- Draco Meteor
- Ice Beam
- Flash Cannon

Azumarill @ Choice Band
Ability: Sap Sipper
EVs: 228 HP / 252 Atk / 28 Spe
Adamant Nature
- Aqua Jet
- Waterfall
- Play Rough
- Knock Off

Swampert-Mega @ Swampertite
Ability: Torrent
EVs: 248 HP / 252 Atk / 8 Spe
Adamant Nature
- Stealth Rock
- Waterfall
- Earthquake
- Ice Punch

Tentacruel @ Black Sludge
Ability: Rain Dish
EVs: 240 HP / 244 Def / 24 Spe
Bold Nature
IVs: 0 Atk
- Rapid Spin
- Scald
- Toxic Spikes
- Rain Dance