Meloetta seems to be a femininely anthropomorphic figure with musical bar-style streaks in its hair, quarter notes (crotchets) (♩) for its arms and hands and pupil-less eyes resembling whole notes (semibreves). It has a jewel on its forehead and a black headpiece that seems to be shaped like a treble clef which doubles as an attached microphone such as one often used by singers. Its ovular head seems to be ⅓ its body's height and about half its height in width. In its Aria Forme, it has light blue eyes and flowing, wavy hair with light-blue ovals that resemble whole notes. In its Pirouette Forme, it has auburn hair that seems to be stylized in a high bun and red eyes. In either Forme, its midriff and eyes match its hair. It is a genderless species.
According to artists in Unova, Meloetta's beautiful music and dance inspired many works of art, music, and songs. This made the Pokémon popular among both musicians and dancers.
Meloetta is able to change forms when it uses the move Relic Song, which changes its form from Aria Forme to its Pirouette Forme, or vice versa. In its Aria Forme, Meloetta can sing beautiful songs. While in its Pirouette Forme, Meloetta can perform graceful dances. In its Aria Forme, it is a dual-type Normal/Psychic-type Pokémon; in its Pirouette Forme, it is a dual-type Normal/Fighting-type Pokémon. It reverts to Aria Forme when switched out or when the battle ends. Like many other Legendary and Mythical Pokémon, Meloetta is capable of becoming invisible.
Meloetta made its debut in With a Little Help from My Friends, where it was attracted to the flute music made by Bianca. After sneaking aboard the Battle Subway train, Meloetta found its way to Café Sonata, only to be attacked by a group of wild Vullaby. After finding out what happened, White protected Meloetta while Bianca decided to take a guitar and play with Meloetta in place of the Guitarist that was injured in the chaos.
With her skills in music, Bianca helped Meloetta remember the Relic Song that it had long since forgotten. Meloetta uses the attack to transform into its Pirouette Forme and defeat the wild Vullaby group. Afterward, it said its goodbyes to White and Bianca and left.
Meloetta in its Aria Forme appears as a Poké Ball summon in the 3DS and Wii U versions of the game. In the games, it uses Echoed Voice, taking the form of orbs that bounce around the stage and reflect off of terrain. It will appear only after playing for at least eight hours.
NA: A Normal/Psychic-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 Normal- and Psychic-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 may be a combination of melody and pirouette (a type of movement in ballet). Etta is also a common feminine Italian suffix meaning little and may refer to Meloetta's feminine appearance and diminutive size. Etta could also have derived from the famous jazz singer Etta James.