The Epic Tales of Captain Underpants (2018)

S2E12 Captain Underpants and the Taxing Trauma of the Treacherous Tattle Trials, Part 1

When George and Harold face their final exam, they find themselves transported to the ominous Doom Dome. There, they must confront Melvin, who has been enhanced with formidable nanobots, in a fierce showdown to secure their passing grade.