The Swoofs were a fictional alien race created by Papa Smurf using a magic potion and/or spell that he used to make Dreamy believe that he traveled to another planet in "The Astro Smurf" and "Dreamy's Pen Pals". In the episode "Good Neighbor Smurf", Papa Smurf is briefly transformed into Grandpa Swoof when Brainy decides to tinker with his chemicals during his stay in Papa Smurf's house.