The Pixar Theory: How ‘Inside Out’ Fits In The Pixar Universe

inside out disappointing

Take her to the moon for me. Okay? 

The Pixar Theory, or “Grand Unifying Theory of Pixar movies” if you want to be more intense, is a fan theory I wrote in 2013 about how every single feature film made by Pixar Animation Studios is intentionally set in the same universe. Or unintentionally, if you believe in miracles.

pixar theory inside out
Dan O’Brien

I was inspired by an episode of the Web Series, “After Hours,” on In the episode written by Dan O’Brien, the After Hours crew discusses, at length, how a few of the Pixar movies may secretly be about the apocalypse. They address Toy StoryWALL-E, and Cars before giving up because they can’t find a way to connect the films any further.

So I took that as a challenge.

Over the following year, I developed my own theory on how all the movies connect, and the results have been surprisingly epic. People from all over the world have read the theory, and many of you have been having ongoing discussions in the comments that go way beyond anything I first imagined (trust me, I read all of them).

Now, two years later, it’s time to see where we’re at as we welcome a new Pixar movie to the world: Inside Out.

pixar theory part 2

First, it’s important to point out that the theory itself has changed dramatically over the years. A lot of people have called out flaws and underdeveloped points of the theory that make it fall apart for them. I’ve read the feedback and spent the last two years writing a book that fully fleshes out my original theory. It addresses pretty much every major complaint and issue that “debunkers” have thrown at it. And it does this in about ten chapters.

Every chapter follows a specific movie (some are lumped in together, like the Cars franchise). I talk about the context of the movie as it relates to this theory, where it fits in the grand timeline, and how each movie contributes to the idea that these movies exist in the same narrative. And yes, I go way beyond the easter eggs.

My book is available now on paperback and all e-book stores. Hope you guys like it!

pixar theory book

But let’s get back to the main task at hand. Let’s talk about how Inside Out masterfully fits within the idea that all of these Pixar films are connected. What you’re about to read is set up like how I wrote the chapters for my book, so if you like what you read, then that may be a sign that the book is for you. Consider this your sample chapter, if you will.

Obviously, many spoilers are ahead, so read at your own risk. I highly recommend that you watch the movie at least once before reading this, especially since it’s pretty fantastic. You’ve been warned.


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Inside Out is the story of a young girl struggling to grow up, seen through the eyes of her emotions as literal beings. Yes, Pixar made a movie where feelings have feelings.

The movie opens with the birth of Riley Andersen. The first thing you may notice is that she shares the same last name as Bonnie Anderson from Toy Story 3 and the subsequent shorts based on that movie. That may tempt you into believing that Riley and Bonnie are connected somehow, but that’s definitely not the case since their names aren’t spelled the same way.

For context, Pixar named Bonnie after two people: Bonnie Hunt (a frequent voice actor for the Pixar films) and Darla K. Anderson, the producer of Toy Story 3. Darla actually has easter eggs for her name dating all the way back to A Bug’s Life, where you can catch her first name on a box in “Bug City.”

Anyway, we learn early on that Riley grew up in Minnesota, but her family moves to San Francisco when she’s 11 years old. Now it’s true that Bonnie lives in Tri County, around the corner from Andy, and Tri-County does take place in the Bay Area of California. But that’s really just a coincidence. Riley’s family never mentions that they have relatives around, and they only moved to San Francisco for her dad’s job. For that reason, all signs point to this being a coincidence.


pixar theory part 2

Moving on, we get to know Riley through a montage of her early life. When we get to the point where she’s 11, it appears to be modern day. Much of the technology we see throughout the movie — like a Skype surrogate that closely resembles the one used by Trixie in Toy Story 3 and the presence of smartphones — point to this being a film set in 2015.

That means Riley was born in either 2003 or 2004, depending on her exact birthday. Interestingly, that would mean the movie opens during the same year as Finding Nemo. 

We also know that this has to be some time after 2007, which is when Ratatouille takes place. In fact, Inside Out actually confirms that Ratatouille takes place in 2007 instead of 2004, which is a conundrum I ran into while writing the book. It’s all based on the blurry date seen on Gusteau’s will and…eh, don’t worry, it’s not important.

pixar theory part 2

Anyway, the reason we know that this is some time after Ratatouille is because you can see Colette Tatou on the cover of a magazine in a blink-and-you’ll-miss-it easter egg. Judging by the prestige of this magazine, Colette has done well for herself during her years learning from Remy and working at La Ratatouille, the bistro she started with him and Linguini.

After all, why would she be on the cover a magazine before her adventures in Ratatouille? Before she met Linguini, she was just a hardworking chef trying to build a career at a failing restaurant. I find it much more plausible that she’s created a name for herself under the tutelage of the best chef in France.


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So as we get to know Riley in the film’s early montage, we meet her emotions. The film immediately takes us inside her head, where we watch Joy, Sadness, Disgust, Fear, and Anger team up to influence Riley’s actions. They work in “Headquarters” (get it?) and use a mysterious console to control Riley’s decisions.

When an emotion manages to elicit a meaningful experience in real life, a memory is generated and sent to Riley’s long term memory. If it’s a specifically powerful experience, then it will create a core memory that will stay in Headquarters.

It’s somewhat confusing, but Pixar does a great job of explaining this better than I can. They use subtle techniques and cleverness to make the inside of Riley’s head immediately unique, while also incredibly believable.

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For example, the memories are shaped like “marbles” because without them, Riley would lose her marbles.

This is a fun movie.

The plot of Inside Out focuses on Riley being uprooted to a new home in San Fransisco and how this negatively affects her emotions. She misses her friends, never sees her dad anymore because of his new job, and feels pressured to just “be happy” all the time. This causes her to repress her sadness, which eventually causes even more problems.


pixar theory part 2

There’s another fun cameo during this part of the movie. We see a rat that looks a lot like Remy, which is just a fun reminder that Pixar animation transcends the multiple stories they tell. And we also see memories that feature other Pixar characters. You can see Carl and Ellie’s wedding from Up for example.

A good reason for that could be that Riley saw a tape of this wedding at some point, though that would have to be a very old home movie. It could be a picture, since we see a camera in the first frame of that scene in Up. In that case, Riley could have seen that picture and imagined the wedding herself. This has led a lot of people to think that Riley could somehow be related to Carl and Ellie, which would be quite a stretch.

That’s because Carl and Ellie sadly never had kids, so Riley would have to be a distant relative. If she knows about the wedding, then she’s probably met some of this family, but we know in those early scenes of Inside Out that Riley is visiting California for the first time. She thought the Golden Gate bridge was actually golden, after all.

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You could argue that people from this family went to Minnesota to visit her, but I’m not really convinced. Personally, I don’t think we’re able to know just yet, though one theory I have is that she had a teacher or friend’s parent who is somehow connected to Carl and Ellie. A future Pixar movie may shed light on this.

Some people even want to believe that Riley is Boo from Monsters Inc.,or Andy’s mom. Seriously. Look, Riley is Riley. She’s not anyone else, and trying to force these connections is missing the point. For example, the primary reason people think Riley is Boo is because when she’s shown as a toddler, she’s wearing the same hair tie/scrunchy thing that Boo wears in Monsters Inc. 

riley boo

They both even have pig tails. If you’re fixated on them being one in the same, then you miss the cooler reveal, which is that Riley was growing up around the same time as Boo (Monsters Inc., takes place in the early 2000s), so of course that style and those hair ties were popular.

As for Riley being Andy’s mom…I mean that’s way too much of a stretch, even for a limo.

riley andy's mom
Besides the eyes, nose, time period, and basic facial structure, they’re exactly alike! Sigh.


A main theme of the Pixar Theory is the idea that humans emit this strange energy that we see all throughout the films. In Monsters Inc., we learn that the laughter of a child can be harvested as energy for a society of creatures that mysteriously know how to use it. In The Incredibles, this energy is seen tangibly through the exploits of super-powered humans who can do amazing things.

Part of my Pixar Theory (the updated version) is that humans power the toys in Toy Story because they’re built to collect energy by the machines from The Incredibles. The book goes more into detail, but the basic idea is that the machines know how to use human energy as a battery, which carries on as a strategy all the way to the future, when monsters have to go back in time through doors to access this energy because no humans are left thanks to WALL-E. 

But all this time, I’ve wondered why Pixar seems so infatuated with this idea of imagination being a raw power. And Inside Out addresses this pretty head on. The whole premise of the movie is that our emotions (as seen in Monsters Inc.,) are what truly power our actions. And the most powerful emotion for a child is Joy, as seen by Joy being the de facto leader of Riley’s emotions. Most of Riley’s memories are positive, and this is because Joy is inherently a strong emotion for many children.

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The monsters of Monsters Inc, use fear, which can be another strong emotion for some kids, to power their society, but they eventually learn that laughter from joy is far more effective. And why is that? Well, Inside Out explains that joy is one of the first emotions we experience. Joy, the character, is a literal light source. She’s fast, tough, and clever. And she’ll do anything to make Riley happy. The other emotions in comparison are much more passive.

A lingering question in Monsters Inc., is why adults are so difficult to scare. Inside Out sort of answers that by showing how the inside of adults’ minds work. They’re more emotionally balanced, for example, so you don’t see one emotion overpowering the others. When we see inside the heads of Riley’s parents, the emotions don’t bicker like they do in Riley’s head. Instead, they all work together to accomplish the same goal.

But that’s not all. No, no, no. There’s something even better hiding in the dark of this movie that serves as the biggest “Aha!” moment I’ve had since I carefully re-watched Brave and Monsters Inc., back to back.

And it has to do with this guy, Bing Bong.


pixar theory part 2

Bing Bong is Riley’s imaginary friend. Joy and Sadness meet him halfway through the movie, and he helps them navigate Riley’s mind as they try to return to Headquarters. When Riley was three, Bing Bong was her best friend. He’s part cat, part elephant, and part dolphin. He’s made of cotton candy and, naturally, cries candy. He even has a wagon that can fly when powered by songs…


So what’s the big deal? Why is he important?

Simple. Bing Bong is an imaginary friend, yes. But he’s based on a monster. Riley’s monster from when she was three.

At the end of Monsters Inc., Sulley and Mike decide to make kids laugh instead of scream because it generates more energy and is less messed up. We even see Mike go through a door and perform standup comedy for a child.

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But wouldn’t this leave a kid feeling traumatized? Imagine a monster coming through your door, making you laugh, and then disappearing forever. This would make no sense unless…children perceive these new monsters as their imaginary friends.

Bing Bong was a monster who went through Riley’s door and made her laugh when she was three. We know that monsters have animal characteristics, explaining his part-cat/part-elephant appearance. And of course Riley thinks he’s made of cotton candy. Why else would he be pink? I’d even argue that he makes dolphin noises to make Riley laugh, causing her to think he’s part dolphin, too.

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This all makes perfect sense if we’re to believe that well-adjusted kids in Pixar movies grew up meeting monsters in their rooms late at night. And it’s further helped by the fact that in Riley’s subconscious, she’s afraid of clowns, not monsters.

And think of it this way. Isn’t it pretty easy to picture Bing Bong living in Monstropolis?

I have plenty more to say about all of this, but those are the major points. If you want to keep digging, you can read another exploration I did of this movie that goes somewhat more into detail. The gist of it is that Bing Bong is life.

There are more easter eggs for the movie listed at the bottom, but that’s the basic rundown of how Inside Out fits into the Pixar Theory. If you think of something interesting to add or have a compelling question to ask, fire away! Just please…don’t ask if Big Hero 6, a Disney movie, should be in the Pixar Theory…

Ready for more?

The conspiring doesn’t end here. Check out my other Pixar Theory posts from infinity to beyond:

  • The Pixar Theory – the full book available on paperback and ebook via Kindle, Barnes and Noble, iBooks, or just a PDF. This will cover the entire theory and every movie in the Pixar universe, updated from what you just read.


  • There’s a globe in Riley’s classroom that has been shown in every single Toy Story film.
  • Some of the cars in San Francisco have bumper stickers from the Pixar movie, Cars.
  • Bing Bong disturbs a cloud person in Imaginationland, and he looks a lot like the cloud from the Pixar short, “Partly Cloudy.”

  • Also in Imaginationland, you can see a board game with a picture of Nemo that says “Find Me.”
  • One of Riley’s classmates wears a camo shirt with Toy Story characters on it. Well, their silhouettes, at least. It even looks like Arlo from The Good Dinosaur is on there as well. There’s even a popular girl at the school with a skull t-shirt in the same fashion as Sid’s from Toy Story, just in a different color. The 90s are making a comeback!

  • A banner in Riley’s hockey rink showcases a team from Tri-County, which is the setting for Toy Story. I explain this easter egg further in a different article.
  • Blink and you’ll miss a “For the Birds” cameo during Riley’s road trip to San Francisco in the beginning of the movie. It’s just like their appearance in Cars.
  • As always, the animators included ample A113 references. I’ve heard there’s more than one, but the only one I saw personally was A113 as the number of Riley’s classroom.
  • If you look closely at Riley’s Chinese takeout box, you’ll notice it has the same design as the one from A Bug’s Life (pictured below). Those familiar with the theory know that this could be because the same restaurant exists in both movies, so naturally there’d still be remnants of these takeout boxes hundreds of years later during Flik and the gang’s adventures.

inside out pixar theory

Thanks for reading this. To get updates on my theories, books, and giveaways, join my mailing list.

Or just say hey on Twitter: @JonNegroni

314 thoughts on “The Pixar Theory: How ‘Inside Out’ Fits In The Pixar Universe

  1. I really think you might want to put in someone from cars to bring your drawing on top to full circle

  2. Thank you finally someone sees my point

  3. I have a theory that I was hoping to find somewhere in your blogs. I see this theory may mess with your timeline a little. Riley’s friend in Minnesota gets a new friend. What if that new friend is Molly, Andy’s sister from Toy Story? At the end of toy story, it’s snowing on Christmas so they could have moved to Minnesota. Because we don’t know what happened to Molly between toy story 2 and toy story 3 (she went from being a toddler to a preteen/teenager after all) isnt it possible that she maybe moved to a new school, maybe she played hockey? I’m not sure how old Andy was in the first two toy story movies, but Molly has to be at least 5 years younger than Andy, so when Andy goes to college Molly is about 13. Riley is 11. So inside out may be set around present day but it is still possible it is set two years before toy story 3 or maybe considering a larger age gap between Andy and Molly, Inside Out actually occurred the same year as Toy Story 3. Just a theory

    • They live in the same house in Toy Story 2 as they do in three.

  4. you know, i can actualy see how Big Hero 6 fits into the pixar theory, aldo im not sure if there are any easter egs, or drop ofs, but i can see how Big Hero 6 fits in, you see, this happens in the future, before Wall-E but after Toy Story 3, by thene BNS had a preaty good status in the worlds goverment, and managed to change the layout of education, by making all universities either spetialize in science and mechanics (developing Wall-E, Eve-A and the cars) or spetialize biology, to study the evelution of the extreemly human-like animals, the univercity in Big Hero 6 specializes in scyence and mechanics, so explaning the extreem genioses at the univercity.

    sory for my bad grammar, and my inability to remember names and terms; Yeho

    • You know, Big Hero 6 is partly owned by Pixar Studios. I don’t know if that’s enough to add it to the Theory (probably not), but if it is, then that’s probably where it would be in the timeline.

    • Big hero 6 isn’t by Pixar is by Disney there fore is out of the theory..

  5. If Boo and Riley grew up at the same time, and from the scene where she is playing with Bing Bong we assume she is about three years old, then at that time wouldn’t the monsters be scaring kids not making them laugh, at least not at that stage?

    • Not necessarily. That fashion of hair tyes might be like 70s fashion – the type that sticks around for several years. This could mean that there might be a bit of an age gap between Boo and Riley – possibly up to ten years, in fact. Because the Pixar Theory spans such a vast time period, 20 years within another person’s age is considered “growing up in the same time period”.

  6. I think it would be cool if someone found a Bing Bong looking character in Monsters University because that would make me very happy. But I bet it would take forever…

    • possibly the Riley’s monster is the orange 2319 one? Bing Bong’s leg’s have the same color scheme and pattern.
      Btw any idea where Pixar got 2319? I’ve been wondering for years.

      • 2319 has a number of different theories, but the most probably is that W is the 23rd letter of the alphabet and S is the 19th letter. 2319 = WS = White Sock, which is what that monster had on his back.

        • His name was George, the 2319 monster.

        • 2319 monster’s name was George.

  7. Has anyone ever thought that boo is Riley’s mom is boo and the hair bands that riley and boo have is actually passed down through the family. Also to connect andy with riley remember that andy has a letter from carl and ellie and riley has a memory of the wedding so they could be long loss relatives

  8. Hey, Jon!

    You mentioned that Big Hero 6 isn’t in the Pixar Universe. I think I might have found evidence to suggest otherwise. Sorry!

    In the Pixar short Presto, we can see the hecklers from the Muppet Theatre sitting in the balcony of the theatre. In fact, this theatre is basically identical to the one on the Muppet Show. If this is the case, it could suggest that the Muppets and Pixar share a Universe.

    However, in The Little Mermaid, we can see in a crowd of characters Mickey Mouse, Donald Duck, Goofy, and…Kermit the Frog. Cause, like, frogs live underwater? I guess? Anyway, it’s obviously Kermit, so if all of these Easter Eggs are what I think they are, that would mean that Pixar, the Muppets, and The Little Mermaid are all the same world.

    But, the ship Ariel is exploring at the beginning of TLM is exactly the same as the one Elsa and Anna’s parents left Arendell in, which we know sunk some time while at sea. The director of Frozen said that they were headed to a wedding, and since Rapunzel and Flynn/Eugene are in Frozen in a cameo-shot, and Tangled is a German faerie-tale and Frozen is a Scandanavian one, and The Little Mermaid was Danish, we can deduce that the Frozen’s King and Queen’s ship left Norway en route to Germany, and sunk in Denmark along the way. Judging by distances of that trip and given the time period, this seems to be about a two- or three-year trip—exactly the amount of time between the release of Tangled and the release of Frozen.

    So what does this mean? It means, assuming I’m not just over-analyzing things that are really just nothing, that the Muppet Studio was in the Pixar short Presto, Kermit was in The Little Mermaid, the boat from Frozen was in The Little Mermaid, and they were en route to the kingdom in Tangled.

    And in Big Hero 6, a wanted poster for Hans, from Frozen, can be seen in the police station. How is it possible that a mideval criminal made his way to future Japan, retaining his criminal status along the way?

    Time-travel. The hinge-point of the Pixar Universe.

    (PS a response would be nice if you aren’t too busy! =] )

    • But none of those movies are Pixar :/

    • Both movies (Frozen/Tangled & Big Hero 6) are made by Disney. Neither interfere with the Pixar universe. It seems that Disney is trying their own version.

    • It wasn’t made by Pixar! Why won’t people stop trying to fit it in?

  9. Hi!
    I saw a video that may conflict with your view that Bing Bong is Riley’s monster. You see everything that Bing Bong is inspired by is explained (dolphin, elephant and cat) except the inspiration for his feet which look very similar to the monster who was caught with a sock (can remember his name) in the beginning of Monsters Inc. What if he was Riley’s monster and an inspiration for Bing Bong instead of Bing Bong being Riley’s monster??? Just a theory from a different video I watched

      • I hoped someone would notice by now so I haven’t said anything. That video is from Super Carlin Brothers.

    • What if Sulley scared Riley one point in his career? In Inside Out, Fear said, “Was that a bear?!” Sulley does resemble a bear….. But how come Monsters weren’t in Riley’s list of fears?
      I dunno…. Just a thought.

      • I also have my own theory….. what if all those Pixar movies are just movies? Like, all the Disney movies are real, but the Pixar movies in their world are just movies. Why would there be posters of Toy Story and Tarzan in Meet the Robinsons? Why would Nemo appear on posters and board games and as a toy?

    • George Sanderson (aka. 2319) from Monsters Inc. was the inspiration for the feet, just to back up Walshy.

  10. so i have this theory that maybe margo (one of gru’s adoptive daughter from despicable me) are riley’s mother. because they really are so similar, even their glasses are in the same color. what do you think about it?

  11. oh wait…. despicable me is not from pixar….. but… okay..

  12. This is a really good theory.. I could never come up with something so complex.

  13. I’m actually still wondering if you can provide some theory, probably a little scientific one, of how Boo found a way to time travel with the power of wood.

    • The Pixar Theory isn’t scientific. It’s an idea that all the Pixar movies are connected. I really don’t know if there is a scientific explanation.
      Also, will somebody PLEASE add the Pixar shorts to the Theory? They must count as SOMETHING.

        • Well at least it’s gotten better when I asked I was told that they were too abstract and now some of them do add up to something I don’t know about you guys but I feel that at some point in the future there is going to be some more blue text in the original Pixar theory including the shorts also would Inside Out be before or after Up and if before how far before?

        • Inside Out have some references. 4 example, the short film “For the Birds” (^)-(^)v
          Hey, and where is the Easter Egg of Pizza Planet truck?

    • Boo found a way to travel through time with the doors, as Monsters Inc. and modern day are separated by 2500-3000 years. The doors become a portal through time, or something elaborate such as that, which “Boo” uses to travel back to Scottish 14th century, to grow old as a witch in a cabin. She acquires a fascination for wood and carves Sully into a plank she tore from a tree.

  14. And coming son: The good dinosaur…
    The Pixar Theory is AMAZING!
    Greetings from Mexico.

  15. Do the Toy Story Tv Specials add anything to the theory? Also, the Pixar shorts that aren’t part of the theory, are they shorts made within the Pixar universe?

  16. IMPORTANT : this destroys the whole pixar theory unless you have some amazing explanation to it. if the witch who is boo causes everything (animals to talk, gain intelligence) using the magic then the theory is no longer valid. this is because remember boo is not from that(medieval period) time she is from the future who traveled there to get the wisps. if she inadvertently caused animals in the first place to obtain sentience then how is it possible for the animals who had intelligence before she time traveled (including all the animals before her time like in up, and ratatouille) to have that intelligence if she is the one who caused it. its a never ending loop hole that cannot be solved because she cant be the creator of these intelligent animals if they were already there before she time traveled and caused it using magic. thus, pixar theory disproven but still to date best fan theory ever. GG

    • No, your premise is wrong. The idea isn’t that the witch from Brave “caused” everything in these movies. It’s simply an illustration. Read Part 3 of the Pixar Theory or just the book to get more insight on this.

      • The theory isn’t that Boo “created” everything. Just because Boo found magic doesn’t mean that she ra the only one. Other people would have found magic long before her. She just contributes to the population of animals displaying human-like qualities.

  17. I think the mother of Riley is Bonnie , I do not watch the movie , but I think they are very similar.

      • That doesn’t fit. Bonnie is about 5 or 6 years old during Toy Story 3, which takes place in 2007. Riley was born in 2004.

  18. I have a question, in the book” The Pixar Theory” you said that ” they create the BnLStarliners, or space cruise ships, in 2015,” But in the passage above you stated ” and the presence of smartphones- point to this being a films set in 2015.” That would mean that Riley is still living on earth while everyone else is on the space cruise because the earth was too polluted for them. I may have missed something and i maybe wrong, or might have just miss read, i am a 13 year old so i might not fully understand something you said.

  19. Every weekend i used to pay a visit this web site, as i
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  20. In the incredibles when elasti girl borrows a jet to rescue mr incredible it shows her cuddling a pilot that looks similar to charles muntz from up. The timelines would match up i think.

    • Actually, that character is named Snog. He originally had a bigger role, but was cut from the film due to the movie’s runtime being too long. There is no possible way he could be Charles Munz or related to him.

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