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[[File:196-17-j.jpg|thumb|In this scene removed from the dub, Leon is seen watching [[Yugi Mutou|Yugi ]] in tournaments on tv.]][[Image:LeonWilson.png|right|thumb|200px|Leon]]'''Leon von Schroeder''', known in Japan as '''Leonhart von Schroider''' (レオンハルト・フォン・シュレイダー ''Reonharuto fon Shureidā'') is the younger brother of [[Zigfried von Schroeder]]. He is a very famous duelist who uses the alias of "'''Leon Wilson'''" (レオン・ウィルソン, ''Reon Wiruson''). He joins [[Kaiba]]'s KC Grand Championship tournament to help his brother get revenge on [[KaibaCorp|Kaiba Corporation]], though he also aspired to duel [[Yugi Mutou|Yugi]]. He idolizes his brother, yet realizes that [[Zigfried]]'s actions are wrong. When [[Zigfried ]] is disqualified and recruits Leon to help him with his plot to destroy [[KaibaCorp ]] by playing the [[Golden Castle of Stromberg]], which will release a computer virus into the system, Leon initially agrees because he is unaware of his brother's plan. During the Duel with [[Yugi Mutou|Yugi]], he eventually comes to his senses and refuses to help [[Zigfried]], but is unable to remove the card from play. [[YugiMutou|Yugi]], however, comes up with a strategy to [[destroy ]] it by turning its own [[effect ]] against it, while [[Kaiba ]] works on stopping the virus.

Leon's family never paid very much attention to him when he was a kid. They were always focused on [[Zigfried]], and Leon discovered a fondness for fairytales and even wrote a letter to [[Pegasus]], requesting that he make Fairytale Cards.Leon is a big fan of [[Yugi Mutou|Yugi]]and has admired him since [[Duelist Kingdom]]. In a scene removed from the dub, Leon is seen watching [[Yugi Mutou|Yugi]] in various tournaments on tv. Leon has wanted to duel against [[Yugi Mutou|Yugi]] since [[Duelist Kingdom ]] and gets his chance in [[Yu-Gi-Oh! - Episode 196|Episode 196]].

In the English version, Leon made a final appearance in [[Yu-Gi-Oh! - Episode 220|Episode 220]]. He had no lines, he was just standing at the balcony of his castle, looking up at the sky. [[Zigfried ]] was not shown. In the Japanese ending, Leon and [[Zigfried ]] were seen trying to make a business deal with [[Maximillion Pegasus]].

Leon uses a '''Fairy Tale Deck''', composed of cards that were specially created by [[Maximillion Pegasus]] upon Leon's request. Tactically, the deck focuses on restricting the [[opponent]]'s ability to counterattack by removing their monsters [[monster]]s from play temporarily or lowering their [[ATK|attack power]].