Poliwrath @ Damp Rock

Ability: Water Absorb
EVs: 252 HP / 6 Atk / 252 Def
Impish Nature (Defense +, Attack -)
Waterfall
Brick Break / Focus Punch
Ice Punch / Rock Slide
Rain Dance
Persian @ Life Orb

Ability: Technician
EVs: 6 HP / 252 Speed / 252 SAtk
Timid Nature (Speed +, Attack -)
Swift
Water Pulse
Hypnosis
Nasty Plot
Qwilfish @ Leftovers

Ability: Swift Swim
EVs: 168 HP / 252 Atk / 88 Speed
Adamant Nature (Attack +, Special Attack -)
Waterfall
Poison Jab
Explosion
Swords Dance
Magnezone @ Leftovers

Ability: Magnet Pull
EVs: 172 HP / 84 Speed / 252 SAtk
Modest Nature (Special Attack +, Attack -)
Thunderbolt
Hidden Power [Ice]
Magnet Rise
Substitute
Mesprit @ Leftovers

Ability: Levitate
EVs: 252 HP / 176 Def / 80 SAtk
Bold Nature (Defense +, Attack -)
Psychic
Thunderbolt
Ice Beam
Rain Dance
Milotic @ Leftovers

Ability: Marvel Scale
EVs: 252 HP / 6 Def / 252 SDef
Calm Nature (Special Defense +, Attack -)
Surf
Ice Beam
Recover
Toxic / Light Screen