Distributia
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Sean AstinNarrator (voice)
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Jorge DiazMelvin / Stanley Peet (voice)
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Nat FaxonCaptain Underpants / Mr. Krupp (voice)
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Peter HastingsComic Narrator (voice)
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Stephen RootMr. Fyde / Avacadwoe / Hush Muffleman (voice)
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Maggie WheelerLunch Lady (voice)
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Patty MattsonMiss Anthrope / Chalice Aristocrab (voice)
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Jay GragnaniHarold (voice)