Back at the Barnyard (2007)

Season 2: Episode 26

Pig has been hanging out with his imaginary friend, Mr. Wiggleplix, for weeks and it drives the other animals crazy. Then one day, Pig claims that Otis killed Mr. Wiggleplix so Otis has to dress up as Mr. Wiggleplix for Pig to feel better. Things take a turn for the worst when Otis says he is leaving for a magical land but Pig believes it and wants to go with him. All of the sudden, the real Mr. Wiggleplix comes alive and stops Otis from impersonating him.