| Radioactive Boy
| Superhero Information
Radioactive Boy is a child version of Radioactive Man from an alternate universe.
When a young Claude Kane III was trying to save Glowy, his dog, they both got caught in an atomic explosion. Radioactive Boy got pulled through to Radioactive Man's universe along with Glowy, Radioactive Man-Beta and Radioactive Ape. Radioactive Boy then joined the team in going the Betaverse to try and find the cause of the dimensional rifts. Whilst there, the heroes fought against Nega-Pneumatica. When Glowy noticed a man in a booth operating Nega-Pneumatica, he chased after him and ripped his pants. The heroes then knocked off Nega-Pneumatica's head which crushed Glowy, killing him. Radioactive Man then consoled Radioactive Boy over Glowy's death, saying it was the villain's fault and that some power greater than them would bring Glowy back before long.
When the heroes found out that the whole event had been a trick performed by holograms and technology, they found Dr. Broome's Trans-Spatial Stairclimber. Radioactive Boy used it to get back to his own universe.