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

Cast:Akira Kamiya, Hiroya Ishimaru, Keaton Yamada, Kei Tomiyama, Keiichi Noda, Joji Yanami,

Genre:Action, Adventure, Animation,

country:Japan,

Production:Dynamic Planning, Toei Animation,