Grendizer: Getter Robo G - Great Mazinger Kessen! Daikaijuu
Getter Robo G ／ Getter Robo: Grendizer ／ Getter Robot G ／ Gli UFO Robot contro gli invasori spaziali (Parte 2) ／ Goldorak : L`attaque du dragosaure ／ Goldorak : L’Attaque du Dragosaure ／ Grandizer ／ Great Mazinger Decisive Battle! The Great Sea Monster ／ Great Mazinger: Kessen! Daikaijuu! ／ Grendizer ／ Grendizer, Getter Robo G, Great Mazinger: Kessen! Daikaijuu! ／ Grendizer, Getter Robo G, Great Mazinger: Kessen! Daikaijū! ／ Il Grande Mazinga, Getta Robot G, UFO Robot Goldrake contro il Dragosauro ／ L'attaque du Dragosaure ／ Mazinger: Grendizer ／ UFO Robot Goldrake, il Grande Mazinga e Getta Robot G contro il Dragosauro ／ 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 ／ 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 ／ 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
Description
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: Anime News Network)