Duke Devlin is a supporting character in the anime, Yu-Gi-Oh! and is the final antagonist of the first season.
Duke Devlin was a character in the original Yu-Gi-Oh! anime. He was originally a antagonist who wanted to duel Yugi Muto with his own special method called Dungeon Dice Monsters. When he lost he realized that he underestimated Yugi's talent and later on became friends with him and his other friends. He is also found as an opponent in a couple Yu-Gi-Oh! games such as Yu-Gi-Oh!: Capsule Monsters Coliseum for PS2. He was probably the only character in the anime who had a different method of dueling.