DESCRIPTION:"Yuma vs The Cleaning Robot Obomi" is the twenty-first episode of the Yu-Gi-Oh! ZEXAL anime. It first aired in Japan on August 29, 2011.

Title:As they head home from class, Yuma and his friends meet an Obot. When they fail to repair the Obot, she quickly tries to entertain them, and Yuma, wishing to deepen his friendship, decides to Duel her. But then, Obomi disappears. She ends up being manipulated by a criminal of a certain scheme... But then Yuma tries to Duel Obomi to help her regain her memories!?