The Squirrel appeared in the episode "Up a Tree" where he forced a cursed apple into Finn's mouth that shrunk him down. He later appeared in episode as a guard for Finn's cell, he told Finn about flying away from the tree they were stuck in. He and Finn end up escaping from the tree at the end of the episode.
Appearance[]
He has brown fur and oddly large eyes, unlike most characters in Adventure Time.