- Mordecai (from Regular Show) as Big Bird
- Richard (from Peg + Cat) as Elmo
- Johnny Test (from Johnny Test) as Bert
- Dukey (from Johnny Test) as Ernie
- Eduardo (from Foster's Home for Imaginary Friends) as Telly Monster
- Wilt (from Foster's Home for Imaginary Friends) as Baby Bear
- Big Mouth (from Peg + Cat) as Cookie Monster
- Ruby (from Max and Ruby) as Rosita
- Laney Penn (from Grojband) as Prarie Dawn
- Peg (from Peg + Cat) as Zoe
- Max (from Total Drama Pahkitew Island) as Oscar the Grouch
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