Dr. Jumba Jookiba, a Kweltikwan alien scientist from Quelte Quan, gained notoriety for creating 628 illegal genetic experiments, most infamously Experiment 626 (Stitch). He earned his credentials alongside Dr. Jacques von Hämsterviel at Evil Genius University. Their subsequent partnership included running the "Jokes on You" business and conducting genetic experimentation funded by Hämsterviel's ventures. This alliance dissolved when Hämsterviel reported Jumba's illicit activities to the Galactic Federation, resulting in Jumba's arrest and imprisonment. Jumba possesses a large, rotund physique featuring purple and pink skin, four eyes, floppy ears, and three short hairs atop his bald head. On Earth, he typically dons a Hawaiian shirt, shorts, and boots. He demonstrates above-average strength and durability, evidenced by surviving impacts like being thrown through walls or struck by a Volkswagen Beetle during clashes with Stitch. Initially a comical yet ruthless "evil genius," Jumba designed his experiments solely to cause galactic chaos, motivated by anarchy rather than malice. Tasked by the Galactic Councilwoman with capturing the escaped Stitch on Earth, Jumba's worldview shifted upon encountering Lilo Pelekai and her concept of ʻohana (family). Assisting in Lilo's rescue from Captain Gantu led to his redemption and integration into her extended family as a father figure. While retaining pride in his "evil" label, he evolved into a protective, sociable presence exhibiting paternal love for his creations. Scientific intellect remains Jumba's defining trait. He engineered complex lifeforms with unique abilities single-handedly, memorized all 600+ experiment profiles, and invented devices like fusion chambers or experiment-tracking pods using Earth materials. His work includes creating languages (Tantalog) and modifying technology, such as upgrading Lilo's house with a vacuum-tube elevator or building the X-Buggy for experiment capture. In the *Stitch!* anime continuity, he crash-landed on a Saturn-adjacent asteroid pursuing Stitch through a wormhole, reuniting with Pleakley before joining Stitch and Yuna on Izayoi Island. There, he constructed a "good deed counter" to track Stitch's progress toward a wish-granting stone and continued inventing gadgets. Jumba displays recurrent loyalty to family. Offered a return to his laboratory by the Galactic Councilwoman after Lilo rehabilitated most experiments, he initially hesitated to avoid hurting Lilo. Coerced by Hämsterviel to create the enhanced Experiment Leroy, Jumba secretly programmed a shutdown trigger using an Elvis record gifted by Lilo. He ultimately chose permanent residence with Lilo's ʻohana over pursuing his career. In later adventures, he remained a steadfast guardian to Stitch and his human companions, applying his scientific expertise to support their endeavors.