Bubble Beat's body is round, blue-grey, and limbless, with the Heartless emblem adorning its chest. It neck is black and its head sports two glowing, yellow eyes. It also has two short, blue-white horns on either side of its head, and a black and cyan pattern decorating its head that resembles headphones. A large, twisted, blue-grey horn sprouts out of the back of its head. Its most prominent feature is the large, cyan trumpet in the center of its face.