UFO Robot Grendizer vs. Great Mazinger (1976)
- HD 1080
- Runtime: 24m.
- Status: Released
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- Languages: ja
- Country: Japan
- Director: Osamu Kasai
- Stars: Kei Tomiyama, Joji Yanami, Hiroya Ishimaru, Chiyoko Kawashima, Kazuko Sawada
- keywords: mecha, anime, super robot, mazinger
- Production_studio: Dynamic Planning, Toei Animation
- The UFO Robot Grendizer vs. Great Mazinger is featured in the top rankings of 1976
- #10 in Top Animation of 1976
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.