In the scene showing Nani's room, there's a quite faint Mulan poster on the wall.

During Stitch's destroying rampage, he breaks a drawing by Lilo and she claims that it belonged to her "Blue period", an obvious reference to the painter Pablo Picasso.

Stitch translation: EL KI-YO-TAY="Good idea." It refers to El Coyote, one of the producers' favorite restaurants.

The same art designer for Lilo & Stitch did the art for Mulan. He was so inspired by the Japanese animator Miyazaki that he put a little nod to him. Nani goes to 'Kiki's Coffee Hut' to look for a job, and that name alone is a nod to 'Kiki's Delivery Service' that Miyazaki did.

When Nani is looking through the book of different kinds of dogs, watch closely. One of the pages has Lafayette, one of the dogs in the Aristocats.

When Stitch is destroying everything in Lilo's room, as he rips the paper on the easel, you can see a Dumbo figurine sitting on the ledge.

The Summer 2002 issue of Disney News advised readers to watch for references in "Lilo" to "Mulan," Walt Disney Feature Animation Florida's first feature film. I found two: A poster in the dog pound urging people to adopt a dog features a boy hugging Little Brother, Mulan's dog. Later, in a shot of a Hawaii street, one restaurant's name read "Mulan Wok".