After disasters have all but destroyed the Earth, leaving entire cities buried, one man named Violence Jack tries to avert a civil war brewing among the wretched inhabitants of a subterranean metropolis called Evil Town. The known world is now a nightmare after a series of natural disasters. Survivors struggle to survive the harsh conditions. Evil Town is divided into three warring factions each fighting for supremacy.
A scientific exploration in search of a new energy source unleashes a group of powerful demons who begin possessing human bodies and destroying civilization. Close friends Akira and Ryo wind up on different sides of this epic struggle. Akira’s inner strength allows him to maintain his identity and fight for good, but the weaker Ryo is completely overtaken by Satan himself.
Fear runs rampant throughout Tokyo with the revelation that demons in fact exist amongst us. Paranoia and the darker side of humanity boils onto the streets as people turn on one another, suspecting that anyone could in fact be a demon hiding in human clothing. Amidst the growing tensions, tragedy strikes Akira causing his mind to snap, retreating into his subconscious, allowing his Devilish alter-ego Amon to break free from Akira's cage of flesh and wreak havoc on both human and demons alike.
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.
Mazinkaiser vs the Great general of darkness is a retelling of 1974's Mazinger Z vs. The Great General of Darkness. The new Mazinger Team is overwhelmed by the surprise assault of the subterranean Mykene empire resulting in many casualties, but Mazinkaiser ultimately defeats the forces of evil, ending with a bitter duel against the leader of Mykene, the Great General of Darkness.
Kanto Hell Earthquake has demolished the metropolitan completely. After the earthquake, Slum King is kidnapping girls and sell them as sex slaves. Mari is wandering on the devastated field looking for her lover, Ken. But she is also kidnapped by them. While she is tortured and trained as a sex slave, Ken saves her. Ken has become the member of Slum King. The king offers condition to him; in return for releasing her, he has to kill Violence Jack.
Mazinger Z vs. Devilman is a 1973 animated movie that crossed over two then-popular Anime series, both of which were created by Manga artist Go Nagai. 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 Phoenix 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?
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.
When a UFO arrives from space and attacks the Getter Institute, Getter Robo is launched to stop it; but the might of the UFO and its giant space monsters prove to be too much for the Getter team. Not only is Getter Robo defeated, but Ouishan is killed in action! With Getter Robo out of commission, the world's only hope appears to be Great Mazinger, but the aliens' power might also be too much for even him. Can Dr. Saotome build a new Getter Robo in time to help save Great Mazinger, Japan, and the entire world?
Akira is just another normal kid in modern-day Tokyo, until an old friend of his, Ryo, shows up and turns his world upside down. Akira learns that there is an upcoming war of demons on humanity and he has just been enlisted for a major tour of duty. But the only way to fight a demon is with their power, so Akira and Ryo risk a dangerous ceremony in an attempt to create humanity's only hope: the powerful Devilman.
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
Akira Fudo (aka Devil Man) fights more demons trying to kill him. The strongest enemy sent from the demon's world is Silen, the demon bird.
As Akira Fudo wakes up, he finds himself in a "chibi" form, which he thinks doesn't fit a hero such as himself. He is not the only one that has changed. Together with Ryo and Miki, they set out on a journey to restore their proper appearances and find out what caused this change. During their adventure they find several other characters from the world of Go Nagai, such as Mazinger Z, Dr. Hell, Baron Ashura, and others.
A teacher sent out by Toenail Of Satan to the prestigious Sparta Academy had students receive the highest-ranked humiliation punishment in the name of shame ...
In the year 20XX, mysterious meteors bombard the Earth and usher in an age of horrific beasts known as 'ANOROC', hunting and killing humans for their life force. The Earth has one last defender against them; her name is 'LION-GIRL'.
When an UFO delivers a metal-eating monster to the heart of Japan, Getter Robo and Mazinger Z are launched to combat the alien menace. Fighting individually, the space monster's metal-eating and acid-spitting abilities prove too much for Japan's super robot forces - only their combined might stands a chance against defeating it! But with Mazinger Z damaged, can Getter Robo defend against the monster long enough for its comrade to be repaired? And even with forces combined, can they defeat the monster before all of Japan is destroyed?
The survivors of Kanto's Hell Earthquake built a new city and christened it "Hope Town". However, this peaceful town becomes a nightmare when it's raided by the motorcycle gang, "Hell's Wind". They abduct the women while the remaining townsfolk are left helpless against them. Meanwhile, a boy, Saburo, meets Jun. Jun's lover was previously murdered, and the duo help one another to fight against Hell's Wind. The battles are getting more and more difficult, but with the appearance of Violence Jack, the citizens seem to gain the upper hand against Hell's Wind.
One night, a man carrying a briefcase is attacked by masked bandits. Cutey Honey narrowly saves him. The man's briefcase, an archaeologist, contains a strange chrysalis that he stole from the Panther Claw organization. This butterfly, originally from Mexico and extinct for 6,000 years, is according to legend a guardian angel, helping men reach paradise. The Panther Claw organization tries to recover the briefcase, but fails again... However, they manage to kidnap Cutey Honey's best friend. To save him, our heroine will accompany the archaeologist to Central America following in the footsteps of an ancient civilization, where she fights against insectoids and ends up in a forest full of bright green butterflies.
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.
