Gear Fighter Dendoh (GEAR戦士電童, Gia Faitā Dendō) is a Japanese robot anime television series produced by TV Tokyo, Yomiko Advertising and Sunrise.
It was directed by Mitsuo Fukuda, with Chiaki Morosawa handling series scripts, Hirokazu Hisayuki designing the characters and monsters, Satoshi Shigeta serving as mechanical animation director and Toshihiko Sahashi composing the music.
17 years later, the giant fortress "Spiral Castle" of Galfa, a mechanical life form that plans to exterminate the human race, flies to the moon one day.
Just as a mecha-beast sets its sights on them and attacks, a giant blue robot breaks through the floor and appears, welcoming the startled pair into its chest cockpit.
In the final episode Galfa reveals his true form as a six headed mechanical dragon, possibly a reference to The Beast From The Sea or Orochi.