"The Dueling Monkey", known as "Friendship Power! Barbarian #1 & #2" in the Japanese version, is the eleventh episode of the Yu-Gi-Oh! anime. It first aired in Japan on June 27, 2000 and in the United States on December 15, 2001.
Since Joey defeated her, Mai finds she no longer enjoys Dueling as much as she used to and vows to get revenge. When Rex Raptor challenges her, she says she will take him on, but only if he beats Joey first. Does Joey have what it takes to win his second Duel, especially since Mai has told Yugi not to coach him from the sidelines?
In this episode, Greg Abbey replaces Sam Riegel as the voice of Tristan Taylor.