Mister Atom

Mister Atom is a supervillain appearing in American comic books published by DC Comics. He is a radioactive robot who is regularly seen as an enemy of Shazam. The character first appeared in Captain Marvel Adventures #78 in November 1947. Along with other members of Shazam's rogues' gallery, Mister Atom was recruited by Mister Mind to be part of the second Monster Society of Evil in 1973.