Though he's inanimate, in Zoe's mind, Rocco can do anything. The rock has historically been the cause of much annoyance to Elmo, who often gets flustered and constantly reminds Zoe "Rocco's just a rock!" While Elmo is driven crazy by Rocco's (and Zoe's) antics, the other characters are usually unfazed and willing to play along with Zoe's pretending. In Episode 4235, Elmo accidentally loses Rocco and comes to realize how special he is to Zoe (much like Elmo's Baby David).
Virgil von Vivaldi informs Zoe that Rocco is basalt in Episode 4234, having observed all his Swiss cheese-like holes, meaning he came from a volcano. Rocco's friends and family appear in Episode 4126, including Rocky, Rockmaninov, Uncle Rock, Aunt Rock, and Little Rock; it is unknown if he has other family members.
- Episode 3809 -- Zoe's Pet Rock Rocco
- Episode 3982 -- Cookie Monster nearly eats Rocco
- Episode 4016 -- Zoe and Rosita have a play date with Rocco
- Episode 4043 -- Elmo and Zoe search for Rocco
- Episode 4058 -- Best pet in the world
- Episode 4064 -- Rocco's new dance
- Episode 4077 -- Elmo feels he's treated unfairly by Rocco
- Episode 4097 -- Rock sitter for Rocco
- Episode 4099 -- Rocco takes part in a science experiment
- Episode 4120 -- Baby Bear writes The 3 Astro Bears
- Episode 4121 -- Telly's Doll Freddy Wants to Play With Rocco
- Episode 4126 -- Zoe Has a Birthday Party For Rocco
- Episode 4169 -- Telly the Tiebreaker
- Episode 4234 -- Rock Rock Band
- Episode 4235 -- Zoe Loves Rocco
- Episode 4258 -- Rocco's Boat
- Episode 4310 -- Afraid of the Bark
- Episode 4322 -- Rocco's Playdate
- Episode 4424 -- The Wedding Planner
- Elmo's World: Friends
- Elmo's World: Doctors
- Martha Stewart Living -- Appeared in the background in a "Petkeeping with Marc Morrone" segment.
- Sesamestreet.org -- Happy Halloween Day
- Sesame Street 50th Anniversary HBO promo
- My First Pet
- Sesame Street Glitter Tattoos: Zoe's Favorite Things
- The Sesame Park episode "Rocky and His Friends" introduced a Canadian equivalent of Rocco.