Phoenix King (불사조 로보트 피닉스킹 Bulsajo roboteu Pinikseu-King) is a South Korean animated feature film. It was later dubbed into English and released in America and Europe as Defenders of Space and parts of its footage was used to create Space Thunder Kids. The small image of the movie poster depicts a toy version of Phoenix King that was released.

Phoenix King is identical to a Diaclone toy No.10 Fire Engine, that later became Inferno of the Transformers. This is the earliest animated version of said toy.