Fun Song Factory/The Adventures of Elmo in Grouchland

Cast

 * Bugs Bunny (from Looney Tunes) as Big Bird
 * Jimmy (from Ed, Edd 'n' Eddy) as Elmo
 * Mojo Jojo (from The Powerpuff Girls) as Oscar the Grouch
 * Fred Flintstone (from The Flintstones) as Bert
 * Barney Rubble (from The Flintstones) as Ernie
 * Yogi Bear (from Yogi Bear) as Cookie Monster
 * Edd (from Ed, Edd 'n' Eddy) as Grover
 * Nazz (from Ed, Edd 'n' Eddy) as Prairie Dawn
 * Snagglepuss (from Yogi Bear) as Count von Count
 * Dee Dee (from Dexter's Laboratory) as Zoe
 * Frankie Foster (from Foster's Home for Imaginary Friends) as Rosita
 * Raj (from Camp Lazlo) as Telly Monster
 * Boo-Boo Bear (from Yogi Bear) as Baby Bear
 * I.M. Weasel (from I Am Weasel) as Guy Smiley
 * Echo Echo, Swampfire, Humongosaur and Jet Ray (from Ben 10: Alien Force) as Honkers
 * Steven Universe (from Steven Universe) as Dinger
 * Daffy Duck (from Looney Tunes) as Mr. Johnson
 * Bloo (from Foster's Home for Imaginary Friends) as Bug
 * Gretchen (from Camp Lazlo) as Grizzy
 * Scrappy-Doo (from Scooby-Doo) as Stuckweed
 * Squeak, Humphrey, Max and Biff (from The Garfield Show), Floyd (from Garfield and Friends) and Nibbles (from Tom and Jerry) as Pesties
 * Mandark (from Dexter's Laboratory) as Grouch Mayor
 * Shnitzel (from Chowder) as Iago the Donkey
 * Victor (from Ed, Edd 'n' Eddy) as Lassie the Goat
 * Iain Lauchlan as The Alarm Clock Bird
 * Mr. Yum Yum (from Ed, Edd 'n' Eddy) as The Blanket
 * Dave Benson Phillips as The Laundromat Manager
 * Ozzy Octave as Gordon
 * Sarah Davison as Susan
 * Michelle Durler as Gina
 * Paul Hicks as Luis
 * Shantel Boothe, Katie Lewis, Katie Hunter and Dayle Hodge as The Sock Quartet
 * Justin Fletcher as Bob
 * Katy Stephens as Ruthie
 * Tex Richman (from the Muppets) as Huxley
 * Lucy Tuck as Maria
 * Alex Lovell as The Queen of Trash