Stopgo, A.K.A. Experiment 102, is an illegal genetic experiment created by Jumba Jookiba and a character in the Lilo & Stitch franchise. He is designed to cause traffic jams. His one true place is as a traffic light in Kokaua Town.
When he first appeared, he was called 239 due to Jumba's untidy database, but this mistake was corrected.
He directed traffic in Kokaua Town and let Lilo safely cross the street.
Stopgo is a yellow experiment with a long, narrow neck like a traffic pole, and a traffic light-shaped head with a green and red light (most likely his eyes, oriented vertically) on each side of his head.
Stopgo can cause traffic jams by posing as a false traffic light and lighting his eyes up to imitate real street lights.