Sneak, A.K.A. Experiment 471, is an illegal genetic experiment created by Jumba Jookiba. He is designed to sneak up behind you and give you a scare.
Experiment 471 was the 471st genetic experiment created by Jumba with Hämsterviel's funding. He was designed to sneak up behind you and give you a scare.
471 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 an unknown point, 471 was presumbably activated, tamed, and named Sneak.
All 624 experiments, including Sneak, 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 Sneak 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.