'You can't pull the wool over my eyes, those are very clearly different girls!' I'd like to direct your attention to the japanese page for Rhythm Heaven. 'Now hold the phone!', you may be thinking. She's the only character to appear on the cover of the official soundtrack! It's trying to draw attention to her with the light beams. Promotional artwork for the DS title (though she does not make an appearance to my knowledge). She's on the arcade cabinet, featured pretty prominently. This game was also re-released on the Wii title, AND the 3DS title.
Here she is in her own game, Tap Trial (GBA). She's on the cartridge of the first game.