Frankie the Stein: Itsy's assistant; slow (in both body and mind), but dependable.
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Seeno, Hearno and Speakno: A trio of monkeys who cause trouble for Diggs
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Invisible Manny: A resident of the Horrortown district, he is initially thought to be the antagonist, but is actually, in his own words, merely an "errand boy" for the true villain