Before he got to earth, he escaped from the lab where he was going to be jettsoned to a remote asteroid. After crawling through the vents, he managed to get to the hangar and steal a police cruiser,...
Not to my knowledge. It might be noted Lilo and Stitch is in a very very loose sense a toned down adaptation of Riders On the Storm, the controversial Twenties blockbuster- Two sisters on the loose...