4.In Toy Story 2, during the opening credits, you can see a constellation of the iconic Pixar lamp in the stars.
5.In A Bug's Life, Manny the praying mantis is married to a butterfly and not another mantis because female praying mantises eat their partners after mating.
6.In Monster's, Inc., Randall talks to Sully and Mike Wazowski about the "winds of change." In the prequel, Monster's University, you can see a poster with the title "Winds Of Change" in Randall's room.
7.In Monster's University, you can see a lipstick-stained napkin of someone named "Cel" in the outro credits. This could most likely be Celia, Mike Wazowski's present-day girlfriend.
8.In Finding Nemo, you can see Mike Wazowski snorkeling on by during the credits.
9.In Finding Nemo, a child in the dentist's office waiting room is reading a comic book about Mr. Incredible.
10.In The Incredibles, there's a shot-for-shot remake of a scene from Die Hard With A Vengeance. Samuel L. Jackson stars in both films.
11.In The Incredibles 2, the coffee cup that Bob uses is from the company he worked at in the first film.
12.In Cars, the clouds appear to be shaped like tire tracks.
13.In Ratatouille, Bomb Voyage from The Incredibles can be seen in the background.
14.In Ratatouille, Anton Ego's typewriter looks like a skull and his office looks like a coffin.
15.In Wall-E, while Wall-E is organizing his abode, you can spot Rex from Toy Story among his things.
16.In Wall-E, you can see a can of WD-40 in his lunchbox.
17.In Up, Carl wears a bow tie to Ellie's funeral — and for the rest of the film — because Ellie was the one who tied his ties.
18.In Up, both young Carl and Russell have one of their collars tucked into their vests.
19.In Inside Out, two of the memory orbs are of Carl and Ellie's wedding and Carl and Ellie's home that they bought together.
20.In Inside Out, Joy's character is the only one who doesn't cast a shadow because she is a source of light.
21.In Inside Out, Riley's clothes portray her mental state. Her rainbow shirt symbolizes feeling all the emotions — Joy, Rage, Sadness, Disgust, and Fear. Her yellow shirt symbolizes her trying to suppress all her feelings and force herself to be happy. Finally, her black shirt symbolizes her lack of emotion.