Stitch! The Movie
Directed by Tony Craig, Roberts Gannaway. With Daveigh Chase, Chris Sanders, Tia Carrere, David Ogden Stiers. Stitch, an alien living on Earth disguised as a dog with his human family, continues his adventures when he discovers that the alien family he never knew he had is now in Hawaii, being hunted down by galactic forces.
In this, the second movie in the Lilo & Stitch cinematic universe, we find that experiment 626 has 625 other cousins out there, ready to be discovered. Naturally, this movie leads directly into the television series, which ran for the next two years.