"Shark VS Rio: The 100th Dueling Squabble" is the ninety-first episode of the Yu-Gi-Oh! ZEXAL anime. It first aired in Japan on February 17, 2013.
On the way to school Bronk is helped with an injury by Shark's little sister, Rio .Bronk becomes love-struck by Rio's gentleness.Yuma and the Numbers Club are in an uproar over Bronk's first love! At first, Bronk challenges Shark to a Duel in order to win her brother's permission, but he flat out declines. Remarks from Flip andCaswell lead to a huge misunderstanding, that results in the worst sibling quarrel in the history of the entire world!!