1. In Zootopia, while Officer Judy Hopps is ticketing cars around the city, she never crosses the street illegally. She always uses a crosswalk and looks both ways before crossing.
2. In Wall-E, Alaska and Cuba are missing, and the Great Lakes are larger than they should be, presumably due to rising sea levels.
3. Also in Wall-E, AUTO appears closer in each of the captain's portraits, representing his gradual takeover of the Axiom.
4. In The Incredibles, the numbers on Mirage's business card (787-7467) spell out “SUPRHRO” on a keypad.
5. In Tangled, when Mother Gothel says, "I love you most," she kisses Rapunzel's hair, not Rapunzel.
6. In The Lion King, Scar is the only lion whose claws are always extended.
7. In Coco, both Hector and Ernesto de la Cruz's guitar have a single gold tooth — revealing that the guitar actually belonged to Hector.
8. Also in Coco, Buzz, Woody, and Mike Wazowski can be seen as piñatas being sold by one of the street vendors.
9. In Monsters, Inc., Monsters Incorporated doesn't have a Human Resources department — they have an Inhuman Resources department.
10. The mountains in Cars are in the shape of cars and hood ornaments.
11. In Wreck It Ralph, the passcode to King Candy's secret safe is the Konami Code (up, up, down, down, left, right, left, right, B, A, start).
12. In The Good Dinosaur, Hank the "Septopus" can briefly be seen when Arlo falls into the water.
13. In Atlantis: The Lost Empire, King Nedakh is blind because he stared at the crystal during the sinking of Atlantis.
14. In Ratatouille, Ego's study is shaped like a coffin.
15. In Finding Dory, the black pigmentation on Dory's father resembles a receding hairline.
16. In Big Hero 6, a statue of Olaf from Frozen can be seen on the streets of San Fransokyo.
17. Finally, in Up, we see craft supplies by Ellie’s bedside table when she gives the Adventure Book to Carl, which means she wrote her last words to him on her deathbed.
CORRECTION
The guitar in Coco belonged to Hector. An earlier version of this post misstated its owner. Ego's name was also misspelled.