[@Nyahahameha] I know it's meant to be thematic, but considering Meloetta is a mythical Pokémon it's not likely something an average trainer would own right at the start (Also, Pirouette form is only seen when Meloetta uses the move Relic Song which you didn't technically list as a known move so...). If you want another music-themed Pokémon to be your partner, you still have a wide variety of options. Technically, Quaxly's line would be a perfect fit since it's water/fighting.