Alien invaders take over Great Mazinger who is at the entrance of a museum next to Mazinger Z as symbols of peace. Grendizer fights the evil invaders and Great Mazinger is recovered. When the Vegan empire dispatches a new general to oversee the takeover of Earth, he quickly manages to capture Koji Kabuto and, learning of Great Mazinger through interrogation, quickly commandeers it from a museum where it was kept as a symbol of peace. It is now up to Duke Fleed aboard Grendizer to stop humanity's former defender from becoming its destroyer.
Released: Mar 20, 1976
Runtime: 24 minutes
Genre: Animation, Action, Adventure, Science Fiction
Stars: Kei Tomiyama, Joji Yanami, Hiroya Ishimaru, Chiyoko Kawashima, Kazuko Sawada, Kenichi Ogata
Crew: Chiaki Imada (Producer), Osamu Kasai (Director), Chikako Matsubara (Editor), Keisuke Fujikawa (Screenplay), Yuki Kinoshita (Key Animation), Johei Matsuura (Assistant Director)