Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! Great Sea Beast (1976)
Premiere 18 Jul 1976 | 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 | 31 min | Action Adventure Animation
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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
