The television series was produced by King Records, KlockWorx and Xebec and directed by Takashi Noto and Toshimasa Suzuki, with Tow Ubukata handling series composition, Hisashi Hirai designing the characters and Naoki Satō composing the music. It first aired on April 1, 2007, and is now completed with a total of 26 episodes, the last of which having aired on September 30, 2007. Dhianeila gives a short narrative in the first five episodes to explain the Golden Tribe, the Silver, Bronze, Heroic, and Iron Tribes, and the events leading up to the anime series. Since episode 14 a new introduction shows the Iron Tribe members in a different manner than in the first episodes' introduction.