Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster (1976)
- HD 1080
- Runtime: 31m.
- Status: Released
0
- Languages: ja
- Country: Japan
- Director: Masayuki Akehi
- Stars: Akira Kamiya, Hiroya Ishimaru, Keaton Yamada, Kei Tomiyama, Keiichi Noda
- keywords: giant monster, mecha, giant robot, kaiju, super robot, mazinger, getter robo
- Production_studio: Dynamic Planning, Toei Animation
- The Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster is featured in the top rankings of 1976
- #9 in Top Animation of 1976
A giant sea monster known as Dragonsaurus has emerged from out of nowhere, terrorizing the depths of the oceans. Great Mazinger, Grendizer and the Getter Robo G team join forces to combat the new threat. But their task becomes more complicated when Dragonsaurus swallows up Boss Borot and makes its way towards Tokyo. Source: ANN