Lightfoot, A.K.A. Experiment 321, is an illegal genetic experiment created by Jumba Jookiba. She is designed to distract entire populations.
Experiment 321 was the 321st genetic experiment created by Jumba with Hämsterviel's funding. She was designed to distract entire populations (does so by uncurling and curling her tail creating a unique harmonic sound that can stop anyone that hears it in their tracks).
321 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.