Kixx, A.K.A. Experiment 601, is an illegal genetic experiment created by Jumba Jookiba. He is designed to use his superhuman strength and kickboxing skills to bully victims. His one true place is teaching people kickboxing and hosting his own workout video entitled Kickboxing with Kixx. He is voiced by Frank Welker.
He was activated when a water bottle was thrown on the ground and it leaked onto his pod. He reappeared in "The Asteroid", where he caused trouble for both Spooky and Pleakley, but later assisted Stitch. He made a cameo appearance in "Houdini" in his one true place. He was also one of the experiments reverted to evil in "Angel" and one of the players on Lilo's softball team in "Slugger". He helped turn Jumba's ship into a hotel in "Shoe", and was seen briefly in "Checkers".
Kixx is shown to be a talented kickboxer and loves to pick fights, which would consider him a bully. He also appears to be exceedingly dim-witted, but slightly hotheaded. However, after Lilo and Stitch befriended him, Kixx has shown to control his temper a lot better.
Although not the brightest, Kixx is loyal to those who win his trust. He is valiant and an excellent fighter, but also a really big softie deep down. He enjoys kickboxing, wrestling, and baseball and shows a sign of pride. He is also very slow-witted and foolish, as well as ill-tempered, extremely aggressive, and excessively violent.
Kixx is a large purple, muscular, beastly Tasmanian devil-like creature with a violet stomach, chest, ear insides and spots around his eyes, bulky legs and torso, four strong gorilla-like arms with three fingers on each paw, a blue oval spot on each elbow, short ears, hardly any neck, a wide mouth, a round nose and black eyes. He stands 4 feet 7 inches tall and weighs 300 lbs.
Kixx has superhuman strength and kickboxing skills, second only to Stitch. His primary function is hand-to-hand combat skills. He loves to fight and has the capable strength to hold his own against a rebooted 626, and can easily lift and throw a full-grown man, as well as trash a small car. He can roll into a ball and jump really high, similar to Stitch, but it is more durable and has more force than when Stitch does it. He can bench-press locomotives and throw boulders at breakneck speed. This gives him a leaping ability of a few stories with corresponding agility. Kixx also has professional wrestling skills, is extremely fast, and can spin into a tornado.
He can speak basic Tantalog, but he has a raspy voice, and when he does speak, it sounds close to a growl. He can also say karate terms, such as "Ya!"
He has a samurai style of fighting, which he has only displayed while under the effects of Hämsterviel, along with a samurai outfit to match it.
Kixx has shown to be skilled in playing the bongos.
Using the book, Fighting Four-Armed Monsters, his attacks can be countered easily, which led to his downfall by Stitch.
Kixx made an appearance in the Stitch! anime along with Pix, Boomer, Slushy, Blowhard, and Slugger when Yuna and Stitch visited Tokyo Disneyland. He makes a second appearance where Hämsterviel modifies him with a new samurai style of fighting, along with a samurai outfit to match it.
- Kixx's appearance and mannerisms greatly resemble the Tasmanian Devil from Looney Tunes.
- Kixx is named after the soccer team, Philadelphia KiXX.
- Kixx was also mistaken for a wild pig by Charles and Mary, a newlywed couple.
- The climactic battle between Kixx and Stitch is presented in a western-style theme.
- Kixx's pod color is blue.
- Kixx is described by the experiment computer screen as, "Experiment 601. Primary function: Hand-to-hand combat".
- Kixx bears some resemblance to Machamp from Pokémon, even being muscular, having four arms, and highly skilled in physical combat.