Watch Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster (1976) Online

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 Read More

Watch Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster online. Featuring Akira Kamiya and Hiroya Ishimaru, Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster is classified as Action and Adventure genre movie with an average rating across the web of 5.9. It is available for streaming online in the USA The movie was filmed in Japan and was released on 1976. Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster was directed by Masayuki Akehi. Read Less