Meloetta is a distinctly feminine fairy-like Pokémon (though not a Fairy-type) that possesses two forms. It has a large, round white head and a small black-cloaked body with tiny extremities. Its arms and legs are very slender and fragile-looking. In its Aria Forme, Meloetta has green hair that resembles a musical bar. Its eyes are blue-green, along with the round jewel on its forehead. In its Pirouette Forme, Meloetta has auburn hair that seems to be stylized in a high bun. It has red eyes that match the color of its hair. In either Forme, Meloetta's middle section and eyes match its hair color.
Meloetta made its anime debut in the special Pikachu short, which aired alongside the 15th Pokémon movie. Meloetta's other appearance was in "An Epic Defence Force". Meloetta was first pursued by Team Rocket in Virbank City. It was able to elude them but somehow made its way into the Pokestar Studios where Ash had encountered it. After he saved it from a collapse of the falling billboards it stayed close behind him, following him to Virbank Gym.
Meloetta in its Aria Forme appears as a Poké Ball Pokémon in the 3DS and Wii U versions of the game. It will create projectiles that bounce around the stage and reflect off of terrain. It will appear only after playing for at least 8 hours.
NA: A Psychic/Dragon-type Pokémon, Meloetta can change its Forme by using Relic Song. In Smash Bros., Meloetta appears in its Aria Forme, using an attack called Echoed Voice to send waves of sound bouncing around the stage. The more walls and platforms, the harder this is to avoid.
PAL: This Psychic- and Dragon-type Pokémon has the ability to change Forme mid-battle by using Relic Song. Appearing this game in its Aria Forme, it uses Echoed Voice to send echoes shooting up and down the stage, reflecting off walls and platforms. The more obstacles there are on a stage, the harder it is to avoid!
Meloetta is likely based on a fairy-like singer and a ballerina. Its Pirouette Forme's appearance may be inspired by tribal African dancers. The red shoes mentioned in the history is a reference to the Hans Christian Andersen fairytale The Red Shoes.
Meloetta's name may derive from the words melody (melody) and puppet (etta), given the set of musical motifs of this Pokémon and its appearance like a puppet and her hair is like a line of musical notes. It might also come from pirouette,referencing its other form.