Kingdom Hearts 3: 10 Perfect Ways For Pixar Characters To Be Included
6. Up
How: Its own world and/or summon.
Upon visiting Paradise Falls, Sora, Donald and Goofy could come across Carl and Russell shortly after their own arrival. With Dug as a party member and Muntz - who could be utilizing Heartless in his single-minded quest to capture Kevin - Alpha and the rest of the dog pack as the villains, the film's events could play out in Kingdom Hearts' own special way.
Should a world not be included - understandable because the game would likely not be able to focus on the emotion of Carl's past with Ellie in a way that makes the film so affecting - the ability to summon a character like Dug or Kevin into combat would be a great, fun way to include the film instead.