Created by Dr. Jumba Jookiba as one of his destructive genetic experiments, Stitch roughly resembles a blue furred koala with four arms (a lower pair of which are retractable); long, sharp retractable claws (four on each paw); round feet, big rabbit-like ears with notches along the outer rims of them (one on the upper right ear, one on the lower left ear); large dark blue eyes (which appear as black), a big dark blue nose, sharp fanged teeth, two retractable antennae, three retractable spines, indigo markings on his back and the back of his head, aqua countershading around his eyes and from his lower lip down to the base of his torso, and a small, stubby tail. He is super strong, highly intelligent, and incredibly mischievous, yet also (in his own words) cute and fluffy.
Stitch was initially an apathetic and mean creature until he was adopted by Lilo Pelekai on the Hawaiian island of Kauai as her "dog". She used the Hawaiian concept of "'ohana" (meaning family)—and Elvis Presley as a role model—to turn him into a kind and loving person. The two would then tame the other 625 experiments made before him in Lilo & Stitch: The Series using the same "'ohana" philosophy. He personally sees the other experiments as his "cousins", with the exception of Angel (Experiment 624) who becomes his girlfriend. In the franchise's East Asian TV spin-offs, the anime Stitch! and the Chinese animated series Stitch & Ai, Stitch becomes separated from Lilo and ends up on different regions of Earth, where he gains new best friends with other human girls.
Not to be confused with stitches, as in surgical sutures.