Jigglers

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.

Appearance
Jigglers look like two spheres joined by a thin middle section. They have many holes on their body, which their noodly arms and legs can move in and out of at will. They are half blackish-gray and half white on all parts of the body. Fully grown Jigglers can grow taller than the height of a house. When angry or fed specific foods, a Jiggler will flare up and rapidly change colors. The Mama Jiggler looks the same as her children, only larger. Finn describes the Jiggler as looking like "two jiggly bellies stuck together."

Trivia

 * The Mama Jiggler grows long tendrils and flashes rainbow colored when threatened.
 * It is unexplained whether Jigglers eat colors or the actual drawings.
 * The Jiggler also makes an appearance in FusionFall.
 * Apparently, the Jiggler's arms can come completely detached and still work, as seen when he is dancing and his arms leave one hole and go into another one.