Weasel, A.K.A. Experiment 148, is an illegal genetic experiment created by Jumba Jookiba and a character in the Lilo & Stitch franchise. He is designed to crawl up planetary leaders' pants during public speeches.
Experiment 148 was the 148th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to crawl up planetary leader's trousers during public appearances. 148 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.
At some point, 148 was presumably activated, captured, and named Weasel.
The first 624 experiments, including Weasel, 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.
Weasel 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 ʻOe", which caused the Leroy army to shut down due to the original Leroy's fail-safe.
Weasel is a brown weasel-like experiment with black eyes, orange stripes and tan eye patches and a tan stomach from the chin down.
Weasel can climb up planetary leaders' pant legs during public appearances using sneak tactics, along with his size and obvious agility due to his weasel attributes.