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 toward Tokyo.
Other names: Grendizer: Getter Robo G - Great Mazinger Kessen! Daikaijuu
Status: Completed
Country: Japan
Date Release: 1976
Episode: 001 / 001
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