Captain Underpants: The First Epic Movie (Subtitled) (U)

Fourth grade pals George Beard and Harold Hutchins run amok at Jerome Horowitz Elementary School. When one of their pranks backfires, the boys end up in the office of mean-spirited school headmaster, Benjamin Krupp, who vows to separate the lads. In retaliation, George uses a ring from a box of cereal to hypnotise Krupp and the tykes convince the headmaster that he is a superhero called Captain Underpants, who gallivants around town wearing a pair of white y-fronts and a flowing red cape.

https://youtube.com/watch?v=yCn9XE_TFf8%3Fcontrols%3D0