Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster
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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
- Genre: Action, Adventure, Animation
- Release Date: 1976-07-18
- Runtime: 31 min
- Country: Japan
- Language: Japanese
- Status: Released
- IMDb Rating: 6
