Toadblatt's School of Sorcery / Educating Grim / It's Hokey Mon!

S1, E9: "Toadblatt's School of Sorcery" Grim gets Billy and Mandy into Toadblatt's Summer School of Sorcery! They join Nigel Planter's infamous Weaselthorpe House to compete against Gunderstank House. "Educating Grim" Mandy's arch nemesis, Mindy, befriends Grim. But is Mindy all that she seems? "It's Hokey Mon!" Grim brings Billy and Irwin's monster cards to life! Chaos and hilarity ensue.