#halloween# Bart Simpson as Slappy the Dummy design that merges Bart’s mischievous attitude with the sinister, creepy look of Slappy from Goosebumps. Start with Bart’s classic spiky hair but make it shinier and more polished to match Slappy’s ventriloquist dummy style. His face should retain Bart’s usual features but with a slight wooden texture and small, eerie cracks around his mouth, nose, and forehead, giving him a doll-like appearance.