Experiments

"Ohana means family. Family means nobody gets left behind."

-Stitch, Lilo and Stitch-

When Dr. Jumba Jookiba created Stitch, or Experiment 626, it was implied that Stitch was the 626th experiment in a long line of genetically engineered biological lifeforms. This was later confirmed when several of the experiments rained down onto the island of Hawaii on planet Earth, causing havoc on the small islands with varying degrees of danger.

The experiments were eventually rounded up and put into dehydrated storage inside the Citadel, but due to the sheer number of Experiments, some manged to escape this fate. These rogue experiments can rarely been seen around the universe, with only about ten confirmed to be still exploring the universe as a whole.

Biology
Due to the varying nature of the experiments, it's hard to classify them into a single grouping. There are, however, six major groupings that Jumba himself used to better classify his experiments. They are as follows:

0 - Series: Jumba's test batch, including many household helpers.

1 - Series: Civic disturbances.

2 - Series: Technological and scientific.

3 - Series: Psychological.

4 - Series: Military.

5 - Series: Elemental Manipulators.

6 - Series: Battlefield or Doomsday experiments with galactic implications and world-ending properties.

The first digit of the experiments number represents the series it belongs to. For instance Stitch is Experiment 626, meaning it belongs to 6 - Series.

It is also believed by some that Jumba had made other experiments, and these experiments are unaccounted for if they do in fact exist. Not many in the science community believe this, and the hunt for the ten missing experiments is the top priority for related to this subject.

Their Place in the Universe
The experiments were deemed too unstable by the Citadel Council after they caused countless destruction to a small Hawaii island. If not for the efforts of a young Human girl named Lilo, there's no telling how much destruction these experiments could have caused, given their intended purposes and the maniacal nature of their creator.

As such, the vast majority of the experiments were rounded up and dehydrated, then placed in a waterproof vault within the Citadel. Only ten experiments are unaccounted for, with no way of knowing for sure if the 627 experiments that have been catalogued are indeed the only experiments.

On very rare occasions, a story will be heard of a small, weird looking animal with unique abilities that caused destruction to a city, ship or planet, but only in one instance has this turned out to be related to the Jumba Experiments, and even then said Experiment, code named Slipstream for his ability to seemingly blink forward or backwards in time, managed to escape capture and is still out in the universe causing mayhem.