In Piqua, Ohio, best friends and next-door neighbors George Beard and Harold Hutchins create comic books, their newest creation being a superhero named Captain Underpants. Fourth-graders at Jerome Horwitz Elementary School, their pranks to cheer up their classmates put them at odds with their cruel principal Benjamin Krupp.
During a Saturday Invention Convention, George and Harold tamper with classmate Melvin Sneedly’s invention, the Turbo Toilet 2000. Mr. Krupp catches them in the act and threatens to separate the boys, prompting George to use a 3-D Hypno-Ring to hypnotize Mr. Krupp into becoming Captain Underpants.
Captain Underpants causes chaos around town until George and Harold discover they can change him back to Mr. Krupp by splashing water on him. To prevent their separation, they convince Captain Underpants that Mr. Krupp is his secret identity, attracting the attention of the school’s lunch lady, Edith.
Meanwhile, Professor Poopypants is hired as the science teacher. Seeking to eliminate all laughter, he teams up with Melvin to power the Turbo Toilet 2000 with toxic leftovers and turn the students into zombies. Captain Underpants, lacking superpowers, struggles to stop them.
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After Captain Underpants gains real superpowers from the toxic waste and defeats Poopypants, George and Harold destroy the Hypno-Ring to permanently change him back into Mr. Krupp. However, they realize Mr. Krupp needs friends, so they set him up on a date with Edith, leading to a change of heart.
Just when things seem settled, an army of Talking Toilets attacks the restaurant where Mr. Krupp and Edith are dining. Mr. Krupp transforms back into Captain Underpants to save the day, flying away with George and Harold for their next epic adventure together.
Watch Captain Underpants: The First Epic Movie Full Movie Online now and enjoy the whimsical journey of friendship, pranks, and superhero antics!