Astro Boy was based on a Japenise hero. But this hero is way older then Kingdom Hearts. Anyway, Astro Boy was a replace for Dr. Tenma, the world's greatest scientist's son Toby Tenma who has died in a robot car accident (In Astroboy 1980). so Astro has some more missions on the way. Since 1963, Astro has been saving the world, defeating evil, and millions more things. But in this series, Astro is like never-before seen! Enjoy!
Now Astro Boy is now based on a movie starring Freddie Highmore as Astro and
Nicholas Cage as Dr. Tenma. Astroboy is also based on the anime comic.