Heckler

Heckler, A.K.A. Experiment 322, is an illegal genetic experiment created by Jumba Jookiba. He is designed to crush his victims' self confidence with verbal insults. His one true place is on a dunk tank.He is voiced byWayne Knight.

Bio
Experiment 322 was the 322nd genetic experiment created by Jumba with Hämsterviel's funding. He was designed to undermine enemies by verbally insulting their appearance and personality.

322 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.

Lilo & Stitch: The Series
Experiment 322 was activated off screen at a hotel, where he impressed a crowd by insulting the tour guide's hair, shirt and weight.

322 was later chased around town by Gantu, but was able to stay ahead of him by verbally insulting him until 322 was rescued by Lilo and Stitch.

Lilo took 322, whom she named Heckler, to Mertle's house as revenge, where Heckler insulted Mertle's hair and glasses, much to Lilo and Stitch's humor.

Lilo and Stitch shortly after took Heckler back to their house, where the latter insulted both Nani and Jumba. Lilo looked to Heckler for guidance for Pleakley's stand-up comedy at Nani's charity event, and Heckler convinced them to give the audience rotten tomatoes to throw at Pleakley's rotten jokes.

At Nani's charity event, Heckler's insults towards the staff caused them all to quit. When Nani then demanded that Lilo get rid of Heckler, the latter insulted Lilo's voice and her nose before attempting to escape. Gantu then arrived for Heckler, and Lilo, Stitch and Nani, sick of Heckler's verbal abuse, gladly handed him over.

Gantu took Heckler back to his ship, where he prepared to transport Heckler to Hämsterviel. However, Heckler's insults towards Hämsterviel prompted him to order Gantu to release Heckler.

Heckler returned to Nani's charity event, where he threw a rotten tomato at one of Pleakley's jokes. However, at that moment, the entire audience, including Pleakley and Lilo, accepted that Heckler's insults towards them were true, leaving Heckler defeated.

Lilo then found Heckler a one true place over a dunk tank where he provokes people to try and dunk him.

Leroy & Stitch
The first 624 experiments, including Heckler, 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 Heckler 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.