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
Akira Kamiya
Ryo Nagare
Hiroya Ishimaru
Kôji Kabuto
Keaton Yamada
Hayato Jin
Kei Tomiyama
Daisuke Umon / Duke Fleed
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グレンダイザー・ゲッターロボＧ・グレートマジンガー 決戦！大海獣
July 18, 1976
31m
6.0
Masayuki Akehi
Susumu Takaku
Dynamic Planning
JP
Toei Animation
JP
Keiichi Noda
Tetsuya Tsurugi
Joji Yanami
Dr. Umon / Professor Yumi
Rihoko Yoshida
Michiru Saotome
Hiroshi Otake
Boss
Kosei Tomita
Dr. Saotome
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