Papa Smurf
To find the culprit, Papa Smurf takes matters on his hands: he sends a note to the Masked Smurfer, dipped in white ink. After everybody is pied the following day, Brainy Smurf finds the Masked Smurfer's disguise, which makes him the Smurfs' prime suspect. Then, Papa Smurf arrives and tells everybody to show their hands, and Jokey Smurf's hands are white due to the ink; he had pied himself the first time to avert suspicion.