Grendizer: Getter Robo G - Great Mazinger Kessen! Daikaijuu

A gigantic sea monster has burst from the depths of the ocean to the surface, sowing chaos and terror among ships at sea. Wasting no time, the Japanese government sends a super team of robots to fight the beast, made up of Great Mazinger, Getter Robo G and Grendizer. These powerful machines were built to protect humanity from threats like this one, and now their mission is to stop the monster's destructive rampage.

The task becomes even harder, however, when the monster swallows Boss Robot and heads for the Tokyo coastline, intent on continuing its path of destruction. Now the super robot team must not only destroy the sea creature but also rescue their comrade. Time is running out, and the fate of Tokyo and the entire world depends on the actions of Great Mazinger, Getter Robo G and Grendizer.