Luvdisc (Lv. 44) (Ability: Swift Swim) (Moves: Water Pulse/Attract/Sweet Kiss/Draining Kiss)
Whiscash (Lv. 44) (Ability: Oblivious) (Moves: Mud Sport/Waterfall/Zen Headbutt/Earthquake)
Sealeo (Lv. 44) (Ability: Thick Fat) (Moves: Encore/Body Slam/Aurora Beam/Waterfall)
Seaking (Lv. 44) (Ability: Swift Swim) (Moves: Aqua Ring/Rain Dance/Waterfall/Horn Drill)
Milotic (Lv. 46) (Ability: Marvel Scale) (Moves: Hydro Pump/Disarming Voice/Recover/Ice Beam)
Changes:
1. Luvdisc gained 4 levels; lost Flail; & gained Draining Kiss.
2. Whiscash gained 2 levels; lost Amnesia, Rain Dance, and Water Pulse; & gained Mud Sport, Waterfall, and Zen Headbutt.
3. Sealeo gained 4 levels; lost Water Pulse; & gained Waterfall.
4. Seaking gained 2 levels; lost Fury Attack and Water Pulse; & gained Aqua Ring and Waterfall.
5. Milotic gained 3 levels; lost Twister and Water Pulse; & gained Hydro Pump and Disarming Voice.
Opinion:
With the Physical/Special switch, they made the according move switches (oddly a lot of his Pokemon are Physical). Haha, Luvdisc. Whiscash will probably get Mud Sport to hinder Electric-types, but you'll want a Grass-type for it anyway. Sealeo you'll want an Electric- or Fighting-type. Seaking's job is getting Rain Dance up, which means it'll be attacking first so try to knock it out first turn to prevent that. Also be higher level so there's no 1HKO hax. Finally Milotic, yeah, this will still be a pain, especially now that it gets Hydro Pump. Just try hitting it physically and good luck.