Stitch here was an ~evil~ genetic experiment designed take over the galaxy by wrecking havoc and chaos in major cities, He would have switched around street signs and stolen everyone's left shoe! Unfortunately, this little guy got arrested, broke out of prison, stole a cop car and then crash landed in Hawaii, a little island on the planet Earth.
He was mistaken for a dog that was ran over by a semi-truck (this canon is wild, y'all), yet a young girl named Lilo adopted him anyway.

After many shenanigans, hula dancing to Elvis and learning the meaning of Ohana, Stitch found where he belonged and now has a Found Family to call his own.