The Pack: Part 1.Bronk becomes annoyed with Yuma for breaking his promise to not use Numbers in his duel against Shark. Meanwhile, Shark learns that some of the delinquents he is hanging out with, Scorch and Chills, possess Number cards and a planning to steal a priceless deck from a museum. As one of the other delinquents chicken out on the heist, he goes to tell Yuma, who had been reading up on Shark's history, about the trouble Shark got into, after being disqualified and permanently banned from the duel Circuit after he looked at his opponent's deck, and finds out Shark's real name is Reginald Kastle. As Yuma confronts the three, Shark decides to side with Yuma in a Tag Duel. Meanwhile, Tori is trying to persuade Bronk to come with her to cheer Yuma and Shark on. Meanwhile, both Astral and Shark find Scorch and Chills' strategy suspicious, as they seem too confident that they will win. In the meantime, they use their advantage as a tag team to summon several level 5 monsters, allowing Scorch to summon his Number card, Number 61: Volcasaurus, and deal a lot of damage to both Shark and Yuma.