http://pokemondb.net/pokedex/milotic 
Moveset is Crappy...
Attack pros & cons
 Water moves are super-effective against:
FIRE	 GROUND	 ROCK
 Water moves are not very effective against:
WATER	 GRASS	 DRAGON
Defense pros & cons
 These types are not very effective against Water pokemon:
FIRE	 WATER	 ICE	 STEEL
 These types are super-effective against Water pokemon:
ELECTRIC	 GRASS
OU: Alakazam, Aron, Blaziken, Blissey, Breloom, Bronzong, Chandelure, Cloyster, Conkeldurr, Deoxys-D (Suspect), Deoxys-S (Suspect), Ditto, Dragonite, Dusclops, Espeon, Excadrill, Ferrothorn, Forretress, Garchomp, Genesect, Gengar, Gliscor, Gorebyss, Gyarados, Haxorus, Heatran, Hippowdon, Hydreigon, Infernape, Jellicent, Kyurem, Landorus, Ludicolo, Machamp, Magnezone, Manaphy, Metagross, Mew, Ninetales, Politoed, Porygon2, Reuniculus, Rotom-W, Sableye, Salamence, Scizor, Scrafty, Skarmory, Smeargle, Starmie, Swampert, Tentacruel, Thundurus, Tyranitar, Venusaur, Volcarona, Wynaut, Zapdos
-It doesn't stand a chance there.