Everyone/Big Bad Mess (from Sesame Street)

Cast

 * Barney (from Barney and Friends) as Telly Monster
 * Dr. Doofenshmirtz (from Phineas and Ferb) as Oscar the Grouch
 * Swiper (from Dora the Explorer), Cedric the Sorcerer (from Sofia the First), Sheldon J. Plankton (from SpongeBob SquarePants) and Captain Hook (from Jake and the Never Land Pirates) as Four Grouches Named Moe