In "For the Love of Cheese", Grim was accidentally transformed into a frog. He has to get a kiss from Hildy to become human again, but she doesn't like slimy things, including frogs. She thinks that the Love Stone can change Grim back upon hearing about it from their Crystal Ball, in which they saw Grumpy has possession of it after stumbling across it at the mine. But she didn't know the gem's true effect as warned by the Crystal Ball because she rushed out of the house.