Tickle-Tummy

Tickle-Tummy, A.K.A. Experiment 275, is an illegal genetic experiment created by Jumba Jookiba. She is apparently designed to tickle people into hysterics. She was captured by Gantu, but was rescued in "Snafu." She also appeared in Stitch!. She is voiced by Tress MacNeille.

Bio
Experiment 275 was the 275th genetic experiment created by Jumba with Hämsterviel's funding. She was designed to tickle people into hysterics.

275 was at some point dehydrated, and along with the other 624 experiments, was smuggled to earth on Jumba's mission to capture Experiment 626.

All the experiments were released and scattered across the island of Kauai.

Lilo & Stitch: The Series
At an unknown point, Tickle-Tummy was activated and captured by Gantu.

In "Snafu," Tickle-Tummy was freed along with Gantu's other captive experiments by Lilo, Stitch, and several other experiments in a rescue mission. She then tickled Reuben into hysterics, after he denied being ticklish.

Leroy & Stitch
The first 624 experiments, including Tickle-Tummy, were round 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 Tickle-Tummy 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 failsafe.

Stitch! anime
Tickle-Tummy made an appearance in the Stitch! anime along with Frenchfry, Squeak, Pix, and Houdini after being kicked out by Hamsterviel for being useless. She made another appearance in the anime with Squeak, Clip, Nosox, and Retro.

Trivia

 * Some fans believe that Tickle-Tummy is Experiment 628 as she was not on the list of the original 626 experiments in the end credits of Leroy & Stitch. However, the creators have confirmed that Tickle-Tummy is not 628 and that they simply forgot to include Tickle-Tummy on the list.
 * It is not clear what Tickle-Tummy's number is, though she was called 275 (a number taken by Wormhole) in Stitch!.
 * Tickle-Tummy's pod color is white.