In the year 2003, Professor Tenma is distraught when his son Tobio is killed in a car accident. He loses himself in his latest project, creating Atom, a robot boy programmed to be forever good. Upset that his Tobio-substitute can never grow up, Tenma sells Atom to Ham Egg, the cruel ringmaster of a robot circus. Atom meets the kindly Professor Ochanomizu, who adopts him, inspires him to become a crusader against evil, and eventually builds him a robot "sister," Uran.

Alternative timelines of plot points from Zi Chuan.

This was shown as part of the "Jump Super Anime Tour" of October 1994, prior to the Ninku TV series.

How much humiliation can four people and a penguin take? Hard boiled Aito? Sexy bombshell Rihoko? Choji the red brief? Shining Fuusuke? Cutesy Hooter Hiroyuki? Oh, gimme a break! Who do these guys think they are? The Ninku? Unfortunately for the real Aito, Choji, Rihoko, and Fuusuke, they do. But little did these imposters know when they stumbled on this sleepy little desert town, that there’d be a price to pay for being treated like the real Ninku, namely, having to fight the deadly Heaven & Earth brothers! Fortunately for our phony friends, the real Aito, Choji, and Fuusuke step in, there’s nothing but trouble for the bad guys. Can the Ninku art of magic fighting beat the Heaven & Earth brothers deadly fighting style?