It's Hokey Mon! Grim brings monster cards to life. Details Casts Title It's Hokey Mon! Genres Animation Comedy Kids Release Date 2003-06-13 Episode Runtime 00 Hours 11 Minutes Season Number 2 Episode Number 3 Production Companies Cartoon Network Studios Greg Eagles Grim (voice) Richard Steven Horvitz Billy (voice) Grey DeLisle Mandy (voice) Vanessa Marshall Irwin (voice)