Leroy

Leroy (known as Experiment 629) is the main antagonist of Leroy & Stitch. He is Stitch's evil twin, and has an army of clones. He is designed to have all of Stitch's powers, but he also has the ability to disguise himself as Stitch by changing his fur color from red to blue and instantly regrow his fur. He is Hämsterviel's new henchman and own version of Stitch. His one true place is in prison. He is voiced by Chris Sanders, the same actor who voiced Stitch.

Personality
Leroy is a antagonistic, intelligent, conceited, rude, small-minded, and shapeshifting experiment who is Hamsterviel's henchman and Stitch's arch-enemy and evil twin.

Like Stitch, Leroy is shown to be very destructive, but in a more vicious than mischievous way. He is also shown to be a physical, sadistic, cruel and disgusting slob. Despite this, he also possesses some of Stitch's habits, including holding soda cans in his mouth, and picking his nose with his tongue.

Leroy is cunning and quite mischievous like Stitch, though isn't quite as immature despite the "age" difference. Where the similarities end is how brutal Leroy is in comparison to Stitch. Leroy isn't above using violence to get things accomplished and quite enjoys tormenting his foes whenever possible. Leroy will more often than not rely on brute force in battle and tends to not show mercy to his opponents. While he does rely on brute force, Leroy is capable of planning out his attacks and his quite smart. While his English isn't perfect, Leroy can speak it a bit better than most other Experiments.

Leroy & Stitch
Experiment 629 was the 629th and last genetic experiment created by Jumba with Hämsterviel's funding. He was designed to have all of Stitch's powers, with a little extra boost of strength and speed. He was named Leroy by Dr. Hämsterviel.

While spending a few years on Earth, Jumba had an unfinished experiment at his laboratory in deep space. After Lilo and Stitch had successfully captured all 625 experiments and turned them from bad to good, Jumba regained access to his lab. During this time, Jumba's evil former partner Dr. Hämsterviel escaped prison with Gantu's help.

Jumba started creating an experiment with explosive saliva from a similar template to Stitch until he was forced by Hämsterviel (who paid Jumba a visit) to instead make the latter "a new version of 626." Forced to comply, Jumba created a red, destructive replica of Stitch, and Leroy was born. Shortly after, Stitch attacked the lab, and Leroy was released to battle Stitch. After a long fight ensued between the twin experiments, Stitch had Leroy pinned down, but Pleakley's untimely arrival distracted Stitch long enough for Leroy to bat Stitch into a containment orb.

After Leroy proved to be more powerful than Stitch, he was then cloned by Hämsterviel into an army.

The original Leroy then took over the BRB by posing as Stitch, the captain, and ordered that the pilots take him, Hämsterviel, and the Leroy army to Turo.

En route, Leroy recieved a call from Lilo, and, resuming his Stitch disguise, attempted to pose as Stitch. However, he was quickly discovered by Lilo to be an imposter, causing Hämsterviel to order Leroy to "hang up" (namely by blasting the communicator).

Meanwhile, a Leroy clone arrived on Earth, where it rounded up all of the first 624 experiments there (along with Mertle Edmonds while capturing Gigi) and brought them to a stadium to be destroyed.

Upon arriving on planet Turo, the Leroy army was able to overthrow the council and gain galactic domination.

Shortly after, Hämsterviel, and the entire Leroy army arrived at the stadium on Earth in the BRB to destroy the captured experiments. Before they could, however, Lilo, Stitch, Jumba, Pleakley, Reuben and a reformed Gantu arrived and a battle ensued between the experiments and the Leroys. Though the experiments were able to overpower the Leroys at first, the Leroys soon gained the upper hand.

However, as the Leroys came close to winning the battle, Lilo, Stitch, Reuben and several other experiments performed the song Aloha `Oe, which caused all the Leroys to shut down due to the original's failsafe.

All of the Leroys were then sent to prison on Asteroid K-37, where they were seen happily dancing to the song "Jailhouse Rock" with an angry Dr. Hämsterviel tapping his feet.

Trivia

 * Leroy is voiced by the same actor who voices Stitch: Chris Sanders.
 * Leroy is Experiment 629. In promotional material for the film, Leroy was also referred to as Experiment 628. However, this is false as he was only called Leroy in the film and is the doppelganger of Experiment 626.
 * In spite of Leroy & Stitch being Leroy's only media role, he continued to appear in a number of merchandise popular in Japan.
 * Leroy is one of the ten known experiments named by someone other than Lilo, the other nine being Yaarp, Gigi, Elastico, Hammerface, Heat, Thresher, Plasmoid, Morpholomew, and Shrink.
 * Leroy looks exactly like Stitch, except Leroy is red, his ears have three smooth dents in them, and he's a bit rougher around the edges.
 * The scene where a Leroy clone crashes on Earth in Mertle's backyard is the same animation when Stitch first crashed on Earth in Lilo & Stitch.
 * When Leroy was defeated, his eyes looked the same exact way as Stitch's eyes were in Lilo & Stitch 2: Stitch Has a Glitch.
 * He has all the same powers as Stitch.
 * Leroy's color seems to come from Evile (Experiment 627), and may have been based off of Evile's original design and evil attitude as well.
 * Leroy's pod color is green.