Stitch was created by the self-proclaimed "evil genius" Dr. Jumba Jookiba, under the name of Experiment 626. He was renamed Stitch when he was "adopted" by a young Hawaiian girl called Lilo. Stitch is coated with blue fur, darker patches on the back of his head and on his back as well. A domed nose rests in the center of his face, between large black, tear-shaped eyes. Sharp teeth reside in this extraterrestrial's mouth, along with a long pink tongue. He has clawed hands and stubby legs that have shorter claws themselves. A short tail juts out from his rear.
When in his true alien form, Stitch retains his basic appearance mentioned above, but sprouts an extra pair of arms, spikes on his back, and two antennae.
Upon his creation, Stitch's only purpose was to destroy everything in his path. He would laugh at the chaos he caused, taking pleasure from harming others. However, during the process of the film, Stitch with the help of his friend Lilo, learns the meaning of Ohana(family) and begins to be calm and loyal.
In Super Smash Flash 2
As stated above, Stitch can be summoned with the help of Battle Cards. When summoned, Stitch will come with four small plasma shotguns to rapidly fire at the opponents. Stitch is very erratic, as he quickly moves around while he is firing his shotguns. He may also jump and shoot under him. However, since Battle Cards have been confirmed to not appear in the game, no one currently knows if Stitch will appear as anything in the game at all.