Grendizer, Getter Robo G, Great Mazinger Decisive Battle! The Great Sea Monster
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UFO Robo Grendizer vs. Great Mazinger
Alien invaders take over Great Mazinger who is at the entrance of a museum next to Mazinger Z as symbols of peace. Grendizer fights the evil invaders and Great Mazinger is recovered.
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UFO Robo Grendizer
Duke Fleed is a survivor of the Fleed Planet who is escaped to the Earth, onboard a mysterious "spaceship", where is raised by Dr. Umon as his adoptive son, and known as Daisuke Umon. Years after his arrival, he's faced with...