Astro Boy (2003)

The Fall of Acheron (1x18)

Air date: Aug 10, 2003

Atom and Uran convince Pluto to stop his destructive ways. But now Pluto's inventor, Shadow, produces a more wicked, more powerful version of Pluto called Dark Pluto. When Dark Pluto attacks, there's only one way Atom can defeat the evil robot: with Pluto's help.