In Extra Mode, King Doo is known as King Doo EX and gains several color changes. King Doo's body is white, his shoes are a dark shade of red, and his iris is a hot pink tone instead of purple. His hair remains blonde. These color changes make him somewhat resemble Zero. In Kirby: Planet Robobot, King Doo has been mechanized by the Haltmann Works Company and features a metal covering over the top of his head. This covering is secured in place by four bolts. King Doo's appearance is otherwise unchanged.