Cartman

Layer 1: Cloud, yellow (hat puff)
Layer 2/3: Bat, black (eyebrows)
Layer 4/5: Circle, black (eye dots)
Layer 6/7: Oval, white (eyes)
Layer 8: Cartoon grin, black
Layer 9: Curved line, blue (trims layer 10)
Layer 10: Curved, line, yellow (hat brim)
Layer 11: Oval, flesh-colored (sideways, face)
Layer 12: Oval, blue (sideways, hat)