Great Mazinger
After many attempts to destroy Grendizer and conquer Earth, King Vega sends General Barendos and his troops in a special mission. Before landing, Barendos stops at moonbase and warns the two officials there that in case of his success they will be both dismissed and killed. Barendos arrives on earth and captures Duke Fleed's closest ally, Koji Kabuto. While under a mind control in captivity, Koji reveals the history and location of both Mazinger Z and Great Mazinger. King Vega seizes the opportunity to capture the Great Mazinger, and then forces Duke Fleed and his Grendizer to do battle against Great Mazinger. Grendizer and Great Mazinger clash in battle until Grendizer manages to deactivate Great Mazinger using a special shot, suggested by Koji.