It's Hokey Mon! The Grim Adventures of Billy & Mandy : Season 2 Episode 3
TV-Y7-FV Cartoon Network 30m int(0)
Aired: June 27th, 2003 @ 8:30 PM EST on Cartoon Network
After watching Billy and Irwin play with their "Hokey Monsters" cards (parodying the Pokémon Trading Card Game), Grim makes the monsters come to life. Soon, all the other kids want their own cards to be real too, and the city is soon under attack by a multitude of Hokey Monsters. To put an end to the mayhem, Mandy draws her own card, Mandy's Monster, which defeats all the other monsters by turning them into toast.