Cast[]
- Sir Handel as Baby Bear
- Peter Sam as Bert
- Skarloey as Big Bird
- Duke as Cookie Monster
- Rusty as Count von Count
- Rheneas as Elmo
- Mr. Percival as Ernie
- Diesel 10, Daisy and Elizabeth as Grouches
- Duncan as Grover
- Troublesome Trucks as Lambs
- Donald and Douglas as MNN Logo Monsters
- Mavis as Mrs. Grouch
- Smudger as Oscar the Grouch
- The Narrow Gauge Trucks as Penguins
- Millie as Prairie Dawn
- Emily as Rosita
- Duck as Snuffy
- Fearless Freddie as Telly Monster
- Diesel as Uncle Hank
- Victor as Wolfgang the Seal
- Rosie as Zoe
The Cartoon Network Characters as the International Sesame Street Muppets[]
- Anais Watterson (from The Amazing World of Gumball) as Alfa
- Darwin Watterson (from The Amazing World of Gumball) as Bjarne Betjent
- Rigby (from Regular Show) as Cousin Pepe
- Flapjack (from The Misadventures of Flapjack) as Elmo-noske
- Panini (from Chowder) as Finchen
- Lazlo (from Camp Lazlo) as Kippi Ben Kippod
- Gumball Watterson (from The Amazing World of Gumball) as Max Mekker
- Edward (from Camp Lazlo) as Moishe Oofnik
- Chowder (from Chowder) as Samson
- Truffles (from Chowder) as Tiffy
- Blossom (from The Powerpuff Girls) as Tita