Captain Underpants and the Preposterous Pulverizing of the Pestering Poopacabra (S02E04)

In "Captain Underpants and the Preposterous Pulverizing of the Pestering Poopacabra," George and Harold embark on a project to train a rat for extra credit. However, chaos ensues when their furry friend breaks free and plunges into the sewers. There, he encounters toxic waste which transforms him into the outrageous Poopacabra! As the boys navigate this unexpected turn of events, they must confront the bizarre creature and find a way to restore order before things spiral out of control.