Checkers, A.K.A. Experiment 029, is an illegal genetic experiment created by Jumba Jookiba. He is designed to make his wearer a supreme ruler by hypnotizing those around them to honor them as if they were king or queen; his effects vanish as soon as he leaves his wearer's head, and other experiments created after Checkers are immune to his hypnotic effect. His one true place is as a decorative crown for certain festivals. He is voiced by Frank Welker.
He was activated off-screen. Lilo first donned him, but her good intentions got many people arrested by Mertle for being "troublemakers" when they accidentally disobeyed Lilo's rules. When Lilo decided to step down, Gantu took Checkers and was in power until Stitch and 625 gathered several other experiments to help overthrow him.
Checkers hasn't shown much emotion or individuality, other than once while running from Gantu. He mostly attaches himself to a person and stays there, almost as an inanimate object; however, on the head of Penny, he ate some of her sandwich and a hot pepper, causing him to leap off his host.
Checkers is a yellow and purple crown-shaped centipede-like experiment with black eyes, a dark pink nose, and four pairs of legs that sits curled up like a crown on people's heads.
Checkers can roll into a crown/hat-like shape while on his host's head, and his wearer gains control over all beings who look upon him or her. Checkers' eyes flash purple when causing the hypnosis, and he can scale/crawl walls. The victims of Checkers' effects visualize his bearer as a ruler of authority, and to humans, they see one as a king or queen with their attire to match, whether or not they are actually wearing the clothing. His effects are undone as soon as he leaves his wearer's head. Also, Checkers is capable of hypnotizing the first 28 experiments, but none made after him.
Other experiments created after Checkers are completely unaffected by his hypnotic effect, and his effects wear off as soon as he leaves his wearer's head, though he will fall/leap off his host after devouring intolerably spicy foods.
Checkers has appeared on multiple occasions in the Stitch! anime wreaking havoc. It is also revealed that he will jump off of his host if he eats intolerably spicy food.
Checkers reappears in "King Meega", intended to be used by Hämsterviel to command the inhabitants to capture Stitch, but escapes on his own to Yuna's school, where everyone intended to use his powers for themselves. Stitch had once captured Checkers and wore him on his head, but his hypnotic powers did not work on anyone else. Jumba recalls that Checkers' powers do not work with Stitch, since Stitch himself is immune to its effects. (This actually contradicts what happened in "Princess Penny", as Reuben had used Checkers himself without any problems.)
- Checkers will immediately jump off his host if he eats intolerably spicy food.
- Checkers is also shown to be ticklish.
- Checkers' pod color is yellow.
- Checkers is described by the experiment computer screen as, "Experiment 029. Primary function: King maker. Give each wear the power of command in all living creatures".