Grendizer, Getter Robo G, Great Mazinger: Kessen! Daikaijuu (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, Gurendaizā Gettā Robo Jī Gurēto Majingā Kessen! Daikaijū, lit. Grendizer, Getter Robo G and Great Mazinger: Decisive Showdown! The Giant Sea Beast) is an animated short film produced by Toei which premiered originally on July 18, 1976 (1976-07-18), in Japan. It is a crossover of three super robot anime: Grendizer, Getter Robo G and Great Mazinger. Like the rest of the Vs. animated films of Toei, the movie features alternate versions of events from the three series and is not canonical to any of them. The film was released in almost all countries where the original Grendizer series was broadcast. It is known as Il Grande Mazinga, Getta Robot e Goldrake contro il Dragosauro in Italy and Goldorak: L'attaque du Dragosaure in France and some parts of Canada.