Cast
Nat FaxonCaptain Underpants / Mr. Krupp / Buffalobe (voice)
Jay GragnaniHarold Hutchins (voice)
Ramone HamiltonGeorge Beard / Young Mr. Cleveland (voice)
Sean AstinNarrator / Putter Mulligan (voice)
Dayci BrookshireJessica / Dressy / Smartaconda (voice)
Jorge DiazMelvin / Stanley Peet (voice)
Todd GrimesBenjamin Franklin (voice)
Peter HastingsComic Narrator / Marlin (voice)
Evan KishiyamaSteve 'Gooch' Yamaguchi (voice)
David KoechnerMr. Meaner (voice)
Phil LaMarrMr. Cleveland / Viper Chai (voice)
Erica LuttrellErica (voice)
Patty MattsonMiss Anthrope (voice)
Brennan MurrayBo Hweemuth (voice)
Nolan NorthLee Dingman / Hugo Mouthingwad (voice)
