Sprout

Sprout, A.K.A. Experiment 509, is an illegal genetic experiment created by Jumba Jookiba. She is designed to grow into a killer forest. Her one true place is atop the pineapple water tower.

BioEdit
Experiment 509 was the 509th genetic experiment created by Jumba with Hämsterviel's funding. She was designed to spawn an uncontrollable forest of destructive replicas of himself.

509 and the other first 624 experiments were deactivated and smuggled to Earth by Jumba during his mission to captureExperiment 626.

All of the experiment pods were released and scattered across the island of Kauai.

Lilo & Stitch: The SeriesEdit
509's pod eventually made its way into a mail office, where it was found by Lilo and taken home.

Jumba, unwilling to risk activating 509 due to the destruction she would create, locked the pod away.

However, Lilo and Stitch stole 509's pod the following night, activated the experiment, named her Sprout, and fed her super-fertilizer.

The next day, Lilo took a rapidly growing Sprout to an orchid competition. When Mertle Edmonds approached Sprout and noticed she was not an orchid, Sprout lashed out at her, causing Mertle to accidentally break his pot open.

Sprout then grew into a massive forest of killer plants which took over the fair.

However, Stitch was able to drag the original Sprout into a water tower, trapping the latter and causing the forest to die without the original Sprout.

Leroy & StitchEdit
The first 624 experiments, including Sprout, 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 Sprout 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 including Sprout performed the song Aloha Oe, which caused the Leroy army to shut down due to the original Leroy's failsafe.