UFO Robot Grendizer vs. Great Mazinger

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.

Cast

Kei Tomiyama

Duke Fleed / Daisuke Umon

Joji Yanami

Dr. Umon

Hiroya Ishimaru

Kouji Kabuto

Chiyoko Kawashima

Hikaru Makiba

Kazuko Sawada

Goro Makiba

Kenichi Ogata

Blacky

Kosei Tomita

Gandal Shirei

Keiichi Noda

Tsurugi Tetsuya