When the evil Dr. Hell attacks the Earth, the mighty giant mecha Mazinger Z is formed to stop him.
Mazinger Z vs. Devilman (マジンガーＺ対デビルマン Majingā Zetto tai Debiruman?) is a 1973 animated movie that crossed over two then-popular Anime series, both of which were created by Manga artist Go Nagai. Note however that the movie features alternate versions of events from both series, and is therefore not canonical to either one. (IMDB) While fighting with some of his enemies Mazinger Z inadvertently knocks them into a volcano, where they crash into the prison of the Satan race and release Pheonix Jenny! Dr. Hell, learning of this, frees the rest of the Satan race and teams up with them to defeat Mazinger Z, and their ability to fly proves to be too much for our hero. Meanwhile, Devilman is also individually fighting the members of the Satan race, but their combined power is too much for him as well; can Mazinger and Devilman put aside their differences and team up to defeat Dr. Hell and the Satan race?
The Andro planet is ruled by the witch Rinka. The Zzanga knight comes to earth to reclaim the Andro planet. He tries to find the robot with supernatural powers which the scientists of Andro had once built. Rinka sends her henchmen Kats and Kobra to capture Zzanga but with the help of Betaman, Jebi and some kids, he is able to find the robot in a cave. He returns to Andro and defeats Rinka with the robot.
Episode 57 "Dr. Hell Occupies Japan" of the original TV show, shown as a movie.
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. 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 commandeers it from a museum where it was kept as a symbol of peace. It is now up to Duke Fleed aboard Grendizer to stop humanity's former defender from becoming its destroyer.
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. Source: ANN
Kouji and his friends have defeated Dr. Hell and are now enjoying a break, but suddenly a strange prophet appears and warns everyone of an oncoming danger, mechanical beasts never seen before start appearing all around the world wrecking havoc. Its up to Kouji and his Mazinger Z to stand up to this threat but it seems he is vastly outnumber and outmatched.
Go Nagai crossover movie.
An Earth Defence Brigade is formed to protect the world against invaders from outer space. The ruthless Frang Gang begins its raid against the earth on land, sea and by air. But they meet their match in the super robots of the Earth Defence Brigade.
Various characters from Go Nagai works including Devil Man, Mazinger, and Violence Jack, become trapped in a parody world where they all be come super deformed. They get trapped in this mishmash, fighting each other and are trying to figure a way back to their own world.
Go Nagai crossover movie.
Mazinkaizer SKL (マジンカイザースカル Majinkaizā Sukaru?) is a Japanese OVA spinoff of Go Nagai's Mazinkaiser, which was in itself a spinoff of Mazinger Z. The first episode was released on November 27, 2010 and was first screened on November 27, 2010. It also has a novel adaptation serialized in ASCII Media Works' Dengeki Hobby Magazine and a manga adaptation published in the mobile phone magazine Shu 2 Comic Gekkin. Like Shin Mazinger Shougeki! Z Hen, characters and references to other works of Go Nagai appear in this series.
When the evil T. Devil wants to take control of the galaxy, he enlists Andrew to help him in his quest for inter-galactic domination. Andrew starts capturing all of Earth's spaceships in order to investigate the planet. Meanwhile, on Earth, the scientists become curious about the disappearing ships and form a squad to investigate. When Andrew begins the invasion, the squad must enter into an epic space battle with the aliens with the fate of the world at stake. Can mankind overcome the awesome power of the alien invaders and save the world?
Shin Mazinger Shogeki! Z Hen, alternatively romanized Shin Mazinger Shougeki! Z Hen and romanized/translated in the Soul of Chogokin toys line as Shin Mazinger Impact Z!, is a new Mazinger anime series, directed by Yasuhiro Imagawa which premiered in Japan on April 4, 2009. According to the production staff, it has no relation to the 1970s show and should not be described as a Mazinger Z remake. The series is a "retelling" of the basic story of Mazinger Z, featuring most of the same characters, mechanical beasts, and some general plots of the original series, plus some additional material. It keeps the original plot line of Mazinger Z, but makes references to other Go Nagai works, such as Z Mazinger, Violence Jack, Mao Dante and others. Elements from other related Mazinger works appear in the series, such as the story of Kedora and the appearance of Energer Z, the original concept before Mazinger Z. Along with the TV series, a new manga, Shin Mazinger Zero started on April 18, 2009 in the magazine Champion Red. The pair responsible for the shōnen manga Akumetsu, Yoshiaki Tabata and Yuki Yogo, write and illustrate the Shin Mazinger Zero manga. In 2010 a game based on the series was released for the PC.