Yu-Gi-Oh! Persona Monsters!

Prequel of "Yu-Gi-Oh! GX: The Sacred Shadows". Before Battle City begins, the Shadow Operatives detected a mass amount of Shadow Activity building up. Deciding to investigate the matter, they are thrown for a wild adventure concerning the card game, Duel Monsters, meet fierce opponents, and making good friends including Yugi Muto, and the Pharaoh.