Ep 11. The Dueling Monkey

Yugi and his friends enjoy a day at the zoo, but trouble arises when Joey's little sister, Serenity, gets lost in the monkey exhibit. After searching frantically, they finally find Serenity, but the group is soon confronted by a mysterious man who challenges Yugi to a duel.

The man introduces himself as Rex Raptor, one of Duelist Kingdom's top competitors, and demands a duel against Yugi. Yugi is hesitant at first, but Rex reveals that he has kidnapped Serenity and will only release her if Yugi wins the duel.

The stakes are high as Yugi and Rex begin their card game, each with their own unique strategies. However, Yugi quickly realizes that Rex is not playing fairly - he's using a special card, the "Jungle Field Spell," which gives him an unfair advantage.

As the duel continues, Yugi must use all his skills to overcome Rex and rescue Serenity. With the help of his friends and his trusted deck of cards, Yugi manages to turn the game around and defeat Rex.

The episode ends with the group reunited and safe, and Yugi reflecting on the power of friendship and the importance of playing fair in the game of dueling.