|Rōmaji||Jon Kurōdo Magunamu|
|Other language names|
جان كلود ماغنوم
|Anime debut||Yu-Gi-Oh! episode 80: "Lights, Camera, Duel"|
|Video game debut||Yu-Gi-Oh! The Sacred Cards|
|Other language voices|
- Guillermo Romero (European Spanish)
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 Wheeler.
Magnum uses a "Ninja" Deck composed of low-Level monsters, many of which Special Summon other monsters when they are Summoned.
Yu-Gi-Oh! North American World Championship Qualifiers 2018