Yu-Gi-Oh! ZEXAL episode 10: "Shark Attack"
Weasel was present at the arcade that the gang makes their headquarters in when Yuma Tsukumo, Tori Meadows and Bronk Stone went there to find Shark. When Shark revealed that he knows them, he and the rest of the gang backed off. He was perturbed that Shark never Duels with any of them and went to Scorch and Chills, hoping they'd do something about Shark's arrogance. They told him that Shark isn't really one of them - they wanted to use him to make money on the underground circuit. They informed Weasel of their plan to rob the museum of a "super rare Deck" containing "Chaos End Ruler - Ruler of the Beginning and the End". Weasel is hesitant to help, and Scorch questioned why - Weasel always wanted to do something big. Weasel talked with Shark later, as the brothers intended to lay the blame on the two of them for the theft. Shark told him to leave town while he still could. Weasel instead ran and informed Yuma of the situation, who agreed to help Shark.