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

• Dynamic Planning
• Toei Animation
• Akira Kamiya
• Hiroya Ishimaru
• Keaton Yamada
• Kei Tomiyama
• Keiichi Noda
• Joji Yanami
• Rihoko Yoshida
• Hiroshi Ôtake