Psychological experiments and fear-based powers.

(Cyber) debuted in the Stitch! anime, further expanding the count. Breaking Down the "Series"

After the initial 626, Jumba created a handful of additional experiments on Earth or under duress, pushing the official canon count to :

628 (plus the prototype 000).

Militaristic and "Top Secret" failures.

| Number Range | Primary Function | Notable Examples | | :--- | :--- | :--- | | | Proto-Types & Logic | Often glitches or very simple functions. | | 100 - 200 | Geologic/Environmental | Earthshakers, lava spurters, deforestations. | | 200 - 300 | Technological/Household | Glitch (223) messes with electronics; Sample (258) records sounds. | | 300 - 400 | Psychological | Spooky (300) scares people; Phantasmo (375) possesses inanimate objects. | | 400 - 500 | Chemical/Biological | Sprout (509) grows aggressive plants; Sproing (513) is a spring. | | 500 - 600 | Elemental/Weather | Kixx (601) teaches kickboxing; Heat (609) creates fire. | | 610 - 626 | Destruction/Chaos | Stitch (626) is the ultimate chaos agent. |

If you include the animated series Lilo & Stitch: The Series and the sequel Leroy & Stitch , hundreds of other experiments are mentioned or appear (experiments 001 through 629), but only a few are named and characterized in detail. The “how many” depends on whether you mean or all experiments referenced in canon.

The Lilo & Stitch universe is built on the chaos of "cousins"—the 626 illegal genetic experiments created by the "evil genius" Dr. Jumba Jookiba. While Stitch (Experiment 626) is the most famous, the franchise eventually expanded the roster well beyond that original number.