かつてエーゲ海に君臨し、脅威の機械化文明を誇った古代ミケーネ帝国。ドクター・ヘルの機械獣を作った存在でもある彼らが、ついに地上世界支配に乗り出した。闇の帝王を頂点に、暗黒大将軍やアルゴス長官といった大幹部、そして七大将軍率いる戦闘獣軍団という一大帝国に対し、敢然と立ち上がったのは兜剣造と科学要塞研究所。その最大の戦力は、マジンガーＺをも超えた新勇者・グレートマジンガーである。マジンガーＺ最大の危機を救った剣鉄也とグレートマジンガーは、甲児とＺの後を引き継いで世界防衛の最前線に立つと、女性パイロット・炎ジュンと彼女のスーパーロボット・ビューナスＡと共に、ミケーネ帝国の戦闘獣との激戦を展開する。果たして人類は、未曾有の危機に打ち勝つことが出来るのか!?
グレートマジンガー (シーズン 0)
Great Mazinger Vs. Getter Robo 0.0
放送日: 1975-03-21
概要: When a UFO appears over Japan, both the heroes of Great Mazinger and Getter Robo want to investigate it first, out of a sense of rivalry. Getter finds it first since the Mazinger robot is being repaired. However they are unable to defeat the apparently living vehicle. It had already dropped a metal-eating monster on Japan named Gilgilgan and Great Mazinger confronts it only to be badly beaten. Later, despite the robot pilots' protests, their two bases decide to join forces to stop Gilgilgan as he starts becoming more powerful and begins to change. They make a plan to lure it to an empty island where they can battle it without causing collateral damage. They get Boss to lure the monster there where it eats Boss Borot in the process. The combined heroes almost defeat Gilgilgan until the UFO returns and allows itself to be eaten to cause its own creation to grow to its final form. During the intense battle the heroes manage to find its weak points and destroy Gilgilgan. Afterward they promise to be friends from then on.
Great Mazinger Vs. Getter Robot G: The Great Clash in the Sky 0.0
放送日: 1975-07-26
概要: Theatrical feature. Great Mazinger and Getter Robo G battle the Mysterious Invaders for the fate of the earth!
UFO Robot Grendizer vs. Great Mazinger 0.0
放送日: 1976-03-20
概要: Theatrical feature. When the Vegan empire dispatches a new general to oversee the takeover of Earth, he quickly manages to capture Koji Kabuto and, learning of Great Mazinger through interrogation, quickly comandeers it from a museum where it was kept as a symbol of peace. It is now up to Duke Fleed and Grendizer to stop humanity's former defender from becoming its destroyer.
Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! Great Sea Beast 0.0
放送日: 1976-07-18
概要: 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.
シーズン
エピソード 56
エピソード 4