Cookie Monster (performed by Frank Oz, currently by David Rudman) is a Muppet on Sesame Street who is famous for his love for cookies. His famous song is "C is for Cookie." Jaden will first meet Cookie Monster in Jaden's Adventures of Don't Eat the Pictures.
- Cookie Monster is Ren the God of Humor's favorite Sesame Street character.
- Jeffrey will meet Cookie Monster in Jeffrey & Friends' Storm Adventures of Don't Eat the Pictures.
- Cookie Monster will make a special appearance in Pooh, Jaden, Jeffrey & Friends' Storm Adventures of The Muppet Show Episode 518: Marty Feldman.
- Cookie Monster will return in Jeffrey, Jaden & Friends' Storm Adventures of Follow That Bird.
- Cookie Monster will appear again in Tammy, DJ and The Adventures of Elmo in Grouchland.
- Cookie Monster will meet Craig in Craig & Friends must Follow That Bird.
- Cookie Monster will reunite with Craig in Craig & Friends join Elmo in Grouchland. At the end, he and Grover will join the club.
- Cookie Monster will appear again in Jeffrey, Jaden, Hiccup & Juniper Lee's Storm Adventures of A Muppet Family Christmas.
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