Ace, A.K.A. Experiment 262, is an illegal genetic experiment created by Jumba Jookiba. He was designed to be a pure evil experiment, but instead turned out to be pure good, much to Jumba's embarrassment. According to Reuben, Jumba kept 262 locked in the basement when friends came over. His one true place is as a member of AARRGGH (Association of Alien Rejects, Reformed Geniuses, and Girls from Hawaii), balancing out Jumba's evil, and as a local do-gooder. He is voiced by Jeff Bennett.
He was activated by a fire hose. When Jumba had his membership revoked from E.G.O. (Evil Genius Organization), Lilo and Stitch tried to trick the head of E.G.O. into thinking that Jumba was still evil. The plan worked until a screen of Ace rescuing a cat from a house on fire was seen.
Ace appears as the exact opposite of Experiment 627 and Leroy, as he will do virtually any good deed for the sake of being good, due to the glitch in his program. He is also a slight show-off, striking heroic poses for fans after saving the day, and his heroic actions have caused him to become a local do-gooder.
Ace is a bright red, square-jawed, roughly koala/dragon/superhero-like experiment with a muscular body, yellow chest and stomach, a manly face, cocked eyebrow, white glove-like front paws, a wide mouth, a blue nose, dark eyes, pointed ears and small yellow-tipped antennae, as well as dazzling teeth. He stands 3 feet tall and weighs 65 lbs.
Ace has a cunning mind, its exact comparison unknown. His cheeks are like elastic, able to hold dozens of gallons with only some expansion, and can expel held liquid in extremely concentrated streams. He has a pair of retractable arms and a form of enhanced strength, exact limits unknown, and it is presumed he has enhanced durability.
Ace is super-strong, has four arms, warm ice-melting breath, and performs heroics and good deeds in the town. He can speak fluent English and fly as seen in the Stitch! anime, but has also become a worldwide superhero.
Ace has no known evil uses to Jumba whatsoever.
Ace made an appearance in a bonus episode of the Stitch! anime where he takes Stitch under his wing as a hero. It is revealed that Ace can now not only speak English and fly, but has also become a worldwide superhero. He helped re-energize Stitch after he was almost erased from existence, due to a time-traveling incident in which his creation was tampered with. He later appeared as one of the experiments who helped Stitch fight Dark End.
- Ace is one of the rare experiments that was not evil before he was found by Lilo and Stitch.
- Intriguingly, Ace's number is the opposite of Stitch's, and while Stitch was originally pure evil, Ace was always pure good.
- Ace's pod color is yellow.
- Ace is described by the experiment computer screen as, "Experiment 262. Primary function: Error. Experiment classification failure. 262 has no known evil uses".
- Ace is one of the few experiments to not appear in the group photo at the end of Leroy & Stitch.