Ozmodiar
Wikisimpsons - The Simpsons Wiki
Information
Ozmodiar is a parody of Great Gazoo from the TV series "The Flintstones". He made Two Appearances on the Simpsons (see Appearances Below). It is said that Homer can only see him. However he has been speaking briefly to Bart, Lisa and Troy McClure.
Appearances
He first appearance was in The Simpsons Spin-off Showcase where he was seen in sneak peek of Season 9 with the Simpsons family and had spoken to Troy. He made his second appearance in the Season 12 episode HOMЯ where he spoke to Bart and Lisa when Bart said that cartoons don't need to make sense and to Homer when Homer is fired.