Shrink (001)

Shrink, A.K.A. Experiment 001, is an illegal genetic experiment created by Jumba Jookiba, and Jumba's first ever experiment. He is designed to shrink and/or enlarge objects. He was apparently named by Jumba and Hämsterviel before coming to Earth. His one true place is enlarging goods at the Keo Farm. Shrink is voiced by Frank Welker.

Bio
Experiment 001 was the first genetic experiment created by Jumba with Hämsterviel's funding. He was an experimental experiment designed to change the sizes of objects.

When he was created, it is presumed that Jumba and/or Hämsterviel dubbed him Shrink.

Right after he was created, it got to the press who posted things about him in the papers. One clip showed a headline of "Idiot Scientist Actually Creates Something!" with Hämsterviel's enlarged bottom in Jumba's face.

Eventually, Shrink and the other first 624 experiments were deactivated and smuggled to Earth by Jumba during his mission to capture Experiment 626.

All of the experiment pods were released and scattered across the island of Kauai.

Lilo & Stitch: The Series
At some point, Shrink was presumably activated, captured, and tamed.

Leroy & Stitch
Shrink was seen in a newspaper clip on the wall of Jumba's lab along with several other pictures of Jumba and Hämsterviel's early accomplishments. Hämsterviel then tried to convince Jumba to work for him again. However, Jumba refused and pointed out that Hämsterviel had been responsible for getting the former arrested.

Later, the first 624 experiments, including Shrink, were rounded up by Leroy and taken to a stadium to be destroyed. However, Lilo, Stitch, Jumba, Pleakley, Reuben and Gantu arrived before the experiments could be destroyed.

It is unknown whether or not Shrink participated in the following battle between the experiments and the Leroy clones.

The Leroys soon gained the upper hand in the battle, but were defeated when Lilo, Stitch, Reuben and several other experiments performed the song "Aloha `Oe," which caused the Leroy army to shut down due to the original Leroy's fail-safe.

Stitch! anime
Shrink makes an appearance in Season 2 of the anime series where he shrinks Stitch and Yuna's cousin. It is revealed that he can be very mischievous and has the ability to levitate. He appears again in a later episode along with Squeak, Clip, Nosox, and Retro.