David Koechner as Mr. Meaner / Flabby Flabulous (voice)
Episodes 1
Captain Underpants and the Frenzied Farts of Flabby Flabulous
July 13, 2018
• 24m
1x1
George and Harold get revenge on their gym teacher by writing him into a ridiculous new comic. But the joke's on them when life imitates art.
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