The Jigglers make their first appearance in the episode "The Jiggler." In the episode, Finn and Jake are followed by a Jiggler because Jake is whistling, and they take him to their Tree Fort, where they discover it has a love of dancing. Finn and Jake also discover that the Jiggler likes taking drawings off paper and eating them. When Jigglers are away from home for too long, they start feeling sick and begin to spew a pink fluid from their holes (which would be considered vomiting). They seem to communicate to each other by whistling. Jigglers also seem to be able to communicate using images that they kiss upon surfaces, changing the colors of their lip marks to sort of "pixelate" a larger image. The baby Jiggler that Finn and Jake find does this after becoming sick and exploding. The creature shows them that it wants to go back to its mother. After realizing that the mother lives near Stanley's house, they are able to successfully return it. There is a juice inside of the Jigglers that they need to live, and the mother uses the juice's scent to tell which babies are hers, likely because they can't make their own scent.