Fibber

Fibber, A.K.A. Experiment 032, is an illegal genetic experiment created by Jumba Jookiba. He is designed to buzz whenever he hears a lie. He was captured by Gantu, but was rescued in "Snafu". His one true place is at court interrogating suspects with the Kauai police force. Fibber is voiced by Jeff Bennett.

Bio
Experiment 032 was the 32nd genetic experiment created by Jumba with Hämsterviel's funding. He was designed to use his lie-detecting ability to force entire civilizations to only ever tell the truth. Based on Jumba's incorrect theory, this would result in a societal collapse.

032 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
At an unknown point, Experiment 032 was activated and captured by Lilo and Stitch.

On the day after Lilo and Stitch had captured 032, named Fibber, Pleakley received a call from his mother. She had been badgering her son about finding a wife, and even told the latter that she'd found a perfect candidate on his home planet. Pleakley then felt heartbroken, knowing he would have to abandon his ohana forever.

Lilo soon came up with the idea for Pleakley to tell his mother he is already engaged to a human, Nani. Pleakley said that he couldn't lie to his own mother, but Jumba then convinced Pleakley that lying would be the best thing for him to do. So Pleakley told his mother about his false engagement, while Fibber kept buzzing.

Sometime later, Pleakley's family arrived at the Pelekai household to see Pleakley in person about his sudden engagement, followed by a fake wedding. Meanwhile, Lilo and Stitch attempted to hide Fibber in all sorts of places to drown out his frequent buzzing caused by Pleakley lying to his family.

Eventually, Pleakley told his family the truth and explained to them that he was happy with his life and didn't want to get married. After they all made amends, Pleakley's family prepared to depart, but then Gantu showed up and grabbed Fibber (though Lilo and Stitch foiled Gantu once before when he crashed the wedding). Regardless, Lilo decided to let Fibber stay with Gantu for now.

In "Spike", Fibber was one of the experiments in Pleakley's E.A.R.W.A.X. group, and buzzed during the therapy session whenever one of the experiments lied (mainly Bonnie, when she lied about her being intelligent).

In "Remmy", Fibber was one of the experiments in Lilo's dream.

Fibber reappeared in "Snafu", and was freed along with Gantu's other captive experiments by Lilo, Stitch, and several other experiments in a rescue mission.

The Origin of Stitch
Fibber was one of the experiments that was gliding on the screen, but he is 580 instead of 032.

Leroy & Stitch
The first 624 experiments, including Fibber, were rounded 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.

Fibber did not participate in the following battle between the experiments and the Leroy clones, instead choosing to retreat with the weaker experiments.

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.

Personality
Fibber appears to be mute and sometimes even blank, though he has displayed emotion on several occasions. In "Spike", when Pleakley convinced the other experiments in his E.A.R.W.A.X. group to attempt the hugging therapy on each other, Fibber can actually be seen shedding tears.

Trivia

 * Fibber did not buzz when 625 said he's not ticklish. It is possible that the containers are soundproof.
 * It is also revealed that Fibber likes cookies.
 * Fibber's pod color is green.
 * Fibber is described by the experiment computer screen as, "Experiment 032 Primary function: Lie detector."
 * In "Spike", Fibber was seen in the E.A.R.W.A.X. group, but Gantu captured him. It is an error.
 * Fibber's head appears in the game Jumba's Lab.