The Grim Adventures of Billy and Mandy: 4x21
The Firebird Sweet
When Billy buys a new cereal, a phoenix emerges from the box and attaches to his head, annoying everybody. Since the phoenix cannot be removed because it revives every time it is destroyed, Billy, Mandy and Grim seek help by going to the factory where the cereal is produced, which is run by Eris, the goddess of chaos. Mandy tricks the phoenix into leaving Billy and attacking Eris instead. It is revealed that all the events were really an episode-within-an-episode.
4 - 1The Secret Snake Club Feb. 25, 2005
4 - 2He's Not Dead, He's My Mascot Apr. 01, 2005
4 - 3Hog Wild Apr. 01, 2005
4 - 4The Bad News Ghouls Apr. 08, 2005
4 - 5The House of No Tomorrow Apr. 08, 2005
4 - 6Happy Huggy Stuffy Bears Apr. 15, 2005
4 - 7The Secret Decoder Ring Apr. 15, 2005
4 - 8Wild Parts Jun. 03, 2005
4 - 9The Problem with Billy Jun. 03, 2005
4 - 10Wishbones Jun. 10, 2005
4 - 11Dream Mutt Jun. 17, 2005
4 - 12Scythe for Sale Jun. 17, 2005
4 - 13Jeffy's Web Jun. 24, 2005
4 - 14Irwin Gets a Clue Jun. 24, 2005
4 - 15Duck! Jun. 24, 2005
4 - 16Aren't You Chupacabra to See Me? Jun. 24, 2005
4 - 17Zip Your Fly Jun. 27, 2005
4 - 18Puddle Jumping Jun. 27, 2005
4 - 19Runaway Pants Jun. 28, 2005
4 - 20Scythe 2.0 Jun. 28, 2005
4 - 21The Firebird Sweet Jun. 29, 2006
4 - 22The Bubble with Billy Jun. 29, 2006
4 - 23Billy Idiot Jun. 30, 2005
4 - 24Home of the Ancients Jun. 30, 2005