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Nat FaxonCaptain Underpants / Mr. Krupp (voice)
Jay GragnaniHarold (voice)
Ramone HamiltonGeorge (voice)
Sean AstinNarrator (voice)
Peter HastingsComic Narrator (voice)
Jorge DiazMelvin (voice)
Dayci BrookshireJessica / Dressy (voice)
Evan KishiyamaSteve 'Gooch' Yamaguchi (voice)
