Pets Peeved.As Yuma and his friends (minus Caswell, who is still resting from his and Bronk's duel with Quattro) meet up with Cat, who has two Heart Pieces, a group of dogs steal Yuma's Heart Pass. Thanks to Cat's ability to communicate with cats, they track them down to a warehouse, where they encounter a supposedly talking dog named Roscoe who leads a gang of dogs. Roscoe challenges Cat to a duel, because she insulted him, in which the fate of both cats and dogs will be decided. Roscoe summons out his Xyz Monster, Sumo King Dog, but Cat manages to survive his attack and summon Cat Girl Magician. It is then revealed the voice behind Roscoe is a young girl named Pip, who had hidden inside Roscoe because she was scared of other people, and dogs were loyal to their owners, no matter what. Cat convinces Pip to continue the duel, though when she gets timid about Cat's tactic, Yuma and the others convince her to fight to the end, allowing her to make a turn around and defeat Cat. Afterwards, Pip returns Yuma's Heart Pass whilst Cathy awards Pip her Heart Pass and Pieces, and convinced her to join the WDC.