Worrywart, A.K.A. Experiment 373, is an illegal genetic experiment created by Jumba Jookiba. He is designed to make you worry about everything.
Experiment 373 was the 373rd genetic experiment created by Jumba with Hämsterviel's funding. He was designed to make you worry about everything.
373 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 the unknown point, he was activated, captured, tamed and named Worrywart.