Jean-Claude Magnum is a Hollywood actor who has starred in several Ninja Movies. He was the 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. He used Hollywood trickery in an attempt to kidnap Mai after he lost.