The series is set in the year 2000. The show follows the exploits of Little Jimmy Sparks, a 12-year-old boy who controls Gigantor, a huge flying robot, with a remote control. The robot is made of steel and has a rocket-powered backpack for flight, a pointy nose, eyes that never move, and incredible strength, but no intelligence (although he started to tap his head as if trying to think in one episode). Whoever has the remote control controls Gigantor.
Originally developed as a weapon by Jimmy’s father, Gigantor was later reprogrammed to act as a guardian of peace. Jimmy Sparks lives with his uncle Dr. Bob Brilliant on a remote island. Jimmy usually wears shorts and a jacket, carries a firearm and occasionally drives a car. Together, Jimmy and Gigantor battle crime around the world, and clash with the many villains who are always trying to steal or undermine the giant robot.
The heroes meet up with Australian ranchers who are dressed like American cowboys. The mad scientist sends Aborigines to attack the white men. These "savages" are naked except for loincloths and a few ornaments. They wear warpaint and feathers in headbands. Incredibly, they ride horses, whoop, and attack exactly as stereotypical movie Indians would. Except for their short, kinky hair and big lips, they're indistinguishable from Indians.
Again, this was a Japanese cartoon produced in 1956. It portrayed an indigenous culture the Japanese should've known from their WW II invasion of Australia. Yet the cartoonists' idea of a "savage" attack came straight from Hollywood movies. To the entire world, apparently, savagery means deadly Plains Indians trying to kill innocent cowboys for no good reason.
Incidentally, in the seventh episode--titled The Diamond Smugglers!--Jimmy Sparks travels to India for a robotics conference. At the opening ceremony, amid the elephants and men in turbans, a little boy prances in a Plains chief headdress. Was this a visual pun: an American Indian in India? Or was it a stupid, stereotypical mistake?
For more on the subject, see Indians in Astro Boy and Native Videos and Cartoons.