Despite her small size and meek voice, Merry can also be very loud and possesses a monstrous inner strength. Her roar is louder than that of Chicago the Lion.
Merry was a playable character in the 1994 board game Let's Go to the Park.
Merry was introduced in Episode 2670, where she was originally scripted by Lou Berger to have been Herry Monster's sister, though she is only referenced as his friend in the final version. She was performed here by Camille Bonora. The character made two more appearances in season 22, now performed by Joey Mazzarino. She appears as a main character in Episode 2854, where she proves to be very knowledgeable at football, and co-stars in the Monsterpiece Theater segment "The Sun Also Rises."
Merry's design was recycled from a small AM Monster puppet that had been used since season 20. The puppet's original design, with a few strands of hair and orange horns, went unchanged for Merry's initial appearances. In season 23, Merry was refurbished with fuller hair, more feminine eyes, and horns removed.
By season 26, Merry's presence on the show had gradually diminished, due in part to the increased prominence of Rosita and Zoe. Her few speaking roles afterward included episodes 3641 and 3707, and a Super Morphin Mega Monsters sketch. Otherwise, she mainly appeared as a background monster, mostly during season 33 as part of a group of monsters who chant "Monster time!" to segue to a monster segment.
- Sesame Street
- Season 21: 2670
- Season 22: 2854
- Season 23: 2924, 2945, 2956, 2970
- Season 24: 3007, 3009, 3011, 3015, 3036, 3038, 3040, 3043, 3044, 3074, 3078, 3082, 3087, 3091, 3101, 3103, 3106, 3109, 3119, 3134
- Season 25: 3136, 3151, 3164, 3232, 3263
- Season 26: 3311, 3321, 3377
- Season 28: 3641
- Season 29: 3707
- Season 32: 3952
- Season 33: 3982, 3988, 4000, 4016, 4019, 4021, 4022
- Sesame Street Jam: A Musical Celebration
- Sesame Street Stays Up Late
- Stars and Street Forever
- The Phil Donahue Show
- Talk, Read, Write
- Big Bird Meets the Orchestra (1993)
- Merry Christmas, Everybody! (1993)
- Bright and Early with Elmo (1994)
- My Name Is Oscar the Grouch (1994)
- Who's Who on Sesame Street (1994 edition)