A serialized sequel series for Disney+ titled Monsters at Work does not feature Boo in it, as show creator Bobs Gannaway wishes to leave her relationship with Sulley following the events of the original film up to the interpretation of the fans. Disney Characters introduced in Kingdom Hearts χ: Mad Hatter • March Hare • Razoul • Royal Guards • Maurice • Gaston Finding Nemo: Nemo • Dory • Marlin • Crush • Bruce • Destiny • Bailey • Hank • Squirt • Nigel • Gill • Sheldon • Pearl • Darla • Charlie • Jenny Toys and Merchandise • Mobile Application (Disney and Star Wars) • Mobile Application (Marvel) • Television Shorts • Kingdom Hearts Union χ • Disney Tsum Tsum Festival • Twisted Wonderland

The Lion King: Simba • Timon • Pumbaa • Rafiki • Scar • Spirit Mufasa • Nala • Shenzi • Baby Simba • Zazu • Adult Simba • Platinum Simba • Mufasa Original Worlds: Destiny Islands • Traverse Town • Radiant Garden/Hollow Bastion • Disney Castle/Disney Town/Timeless River • Dive to the Heart • End of the World • Realm of Darkness • Twilight Town/ Mysterious Tower • The World That Never Was • Castle That Never Was • Land of Departure/Castle Oblivion • Keyblade Graveyard • Daybreak Town/Scala ad Caelum Kim Possible: Kim Possible • Dr. Drakken • Shego • Ron Stoppable • Rufus • Duff Killigan • Monkey FistTangled: Rapunzel • Pascal • Flynn Rider • Maximus • Tiara Rapunzel • Mother Gothel • Wedding Maximus • Baby Rapunzel Domee Shi debunked a popular fan theory that Boo grew up to be Abby Park from Turning Red. She did however, suggest that they could be related and was happy that people considered Boo Korean, at least partially. [4] Coco: Miguel Rivera • Héctor • Dante • Imelda • Pepita • Alebrije Dante • Disguised Miguel • Ernesto • Mama Coco Interestingly, the Nemo toy serves as a reference to Pixar's next film, Finding Nemo, where the protagonist is a clownfish. Mary Gibbs was only two-and-a-half years old when she voiced Boo. Because she was so young, it proved difficult to get her to stand in the recording studio and do her lines. Instead, they simply followed her around with a microphone while she played.

At the end of the film, Mike brings Sulley (now the new CEO of Monsters, Inc.) a surprise, which turns out to be Boo's door reassembled. The door becomes functional when Sulley places the piece he has kept and he opens it to see Boo, who (although off-screen) recognizes him by happily saying, "Kitty!" This gives Sulley a surprised grin on his face as the film closes. When Boo tries to open her closet door after Sulley tells her goodbye and closes it, she’s now 7% taller since the programmers noticed that she was too short.Aladdin: The Genie • Aladdin • Jasmine • Jafar • Abu • Rajah • Iago • Magic Carpet • Disguised Jasmine • Snake Jafar • Vacation Genie • Prince Ali • Aquamarine Jasmine • Elephant Abu • Sultan • Baby Rajah • Red Carpet Genie • Genie Jafar • Cave of Wonders Kingdom Hearts: Sora • Riku • Kairi • Aqua • Xemnas • Ansem, Seeker of Darkness • Ventus • Terra • Chirithy • Lea • Young Xehanort • Roxas • Dark Riku • Naminé

Aladdin: Aladdin • Jasmine • The Sultan • Prince Achmed • Gazeem • Razoul • Rajah • Iago • Abu • Genie • Jafar • Magic Carpet • Pink Flamingo • Beggar Jafar • Golden Scarab Beetle • Magic Lamp • Snake Charmer • Golden Camel Inside Out: Joy • Sadness • Anger • Disgust • Fear • Bing Bong • Frank and Dave • Forgetters • Jangles • Rainbow UnicornPocahontas: Pocahontas • Flit • Meeko • Percy • Grandmother Willow • Governor Ratcliffe • Colors of the Wind Pocahontas Cinderella: Cinderella • Jaq and Gus • Prince Charming • Fairy Godmother • Lady Tremaine • Lucifer • Suzy • Perla • Bruno

Finding Nemo/ Finding Dory: Nemo • Dory • Hank • Crush • Bruce • Baby Dory • Destiny • Bailey • Pearl • Platinum Nemo • Darla Hocus Pocus: Winifred Sanderson • Mary Sanderson • Sarah Sanderson • Binx • Billy Butcherson • Young Winifred • The Book Main Street Electrical Parade: Electrical Parade Elliott • Electrical Parade Minnie • Electrical Parade Tinker Bell • Electrical Parade Cheshire Cat • Electrical Parade Blue FairyIn a book based on the first film, it’s revealed that Boo's real name is Mary Gibbs (the same name as her voice actress). In the film, she signs her drawings with the name "Mary".