Mayhem was a scientist who identified lightning as the source of Captain Marvel Jr.'s powers, and devised a trap that let him siphon off the young hero's energy into a powerful battery. Wearing the battery and wielding Shazam-like powers of his own, Mayhem dubbed himself Captain Monster and challenged Captain Marvel Jr. to a boxing match. During the match Captain Marvel Jr. identified the battery as his opponent's weakness and separated him from it, allowing him to easily capture the criminal.
Battery which when worn gave him Shazam-like powers of flight and strength.
- Appearances of Captain Monster (Earth-S)
- 1 Images featuring Captain Monster (Earth-S)
- Quotations by or about Captain Monster (Earth-S)
- Character Gallery: Captain Monster (Earth-S)
This character is or was primarily an enemy of Captain Marvel, the Wizard Shazam, or any of the extended members of the Marvel Family. This template will categorize articles that include it into the category "Marvel Family Villains."