From MangaHelpers: Six years ago, Tsukihiko was caught in an assassination attempt on a little girl, Sami, when he attempted to be her shield. This incident nearly killed him and the girl together, but the little girl was the daughter of an extremely powerful family. With its vast amount of resources, the family was able to keep both Tsukihiko and Sami alive by recreating both of their bodies with cyborg technology. This has forced Sami to permanently rely on wired connection to her life sustaining computer. On the other hand, Tsukihiko has become a cyborg "Knight," sworn to protect Sami from harms way. [DrCoke]

A short manga version of the UFO Robo Grendizer anime. Released along the anime series, UFO Robot Grendizer follows the adventures of Duke Fleed, the prince of Planet Fleed, who, disguised as Daisuke, a farm worker, fights against the forces that destroyed his planet, the Vegan Empire, also the creators of Grendizer that Duke stole to fight them. While not originaly considered part of the Mazinger series, Koji Kabuto and the Mazinger mechas appear in this series, making it sort of a sequel. Grendizer introduced the concept of a transformable robot and a space mecha, concepts that were later taken into other mecha series. It was extremely popular in Japan, Canada, France, Italy, and the Arab world and has a strong following in those countries even today.

A Robot War ensued an a small robot production island in the Pacific in the year 2025, where sentient supercomputer, Kyron 5, has decided that Mankind was irrelevant. A mecha battalion of Gunhed warriors – huge transformer style tanks – were dispatched to eliminate Kryon 5. They didn’t succeed, but Kyron 5 was essentially marginalized, so no more force was sent. Now, 13 years later, due to a depletion of world resources, the key component that creates supercomputers, Texmexium (I shit you not – this is the name!), is in short supply, as are spare microchips. A group of scavengers have decided to enter the “forbidden zone” and go to the Island in the hopes of collecting Gunhed chips, which are now worth more than gold. From Baka-Updates: In the year 2038, a group of scavengers enter the complex of the renegade Kyron-5 in search of precious element Texmexium. Death befalls each one until only the mechanic Brooklyn is left. He meets a stranded Texas Air Ranger and two children living in the rubble. They must destroy Kyron-5 in order to escape and to save humanity from its wrath. Brooklyn discovers a GUNHED (Gun UNit Heavy Elimination Device) combat robot and restores it. Meanwhile, Babe has been transformed into a bio-droid and is seeking out Sergeant Nim and the Texmexium she stole. In order to save her and destroy Kyron-5, Brooklyn must overcome his fear of cockpits and pilot the GUNHED all the way to the top of the tower. On the way, he faces the combined defenses of the complex.