Jean-Claude Magnum is a Hollywood actor who has starred in several Ninja Movies. He was a suitor and opponent of Mai Valentine. His name is a reference to actor Jean-Claude Van Damme.
Magnum entered Battle City and won five Locator Cards. Needing six to qualify for the finals, he challenged Mai to a Duel for a final Locator Card and the right to marry her. When he lost, he used Hollywood stunts and special effects in an attempt to kidnap her. He was stopped by Joey.