Felix, A.K.A. Experiment 010 (and temporarily Oscar), is an illegal genetic experiment created by Jumba Jookiba. He is designed to be a total neat freak and keep everything spick-and-span, but had a flaw in his program that caused him to become over-obsessed with sterilization before Jumba reprogrammed him into a dirt freak. He was captured by Gantu (who briefly abandoned him), but was rescued in "Snafu". His one true place is doing janitor work at Lilo's hula school, but his actions have promoted him to a mobile recycling service. He is voiced by Tress MacNeille.
Gantu sent 010 to Hämsterviel, who didn't like him and sent him back. Gantu set him free, and Lilo and Stitch found him. Later, after he was upgraded, they sent him back to Gantu, who sent him back to Hämsterviel, who sent him back to Gantu when Woops (600) almost blew his cover. Felix/Oscar was rescued later in "Snafu".
Felix was originally obsessed with cleanliness to the point that he considered even people germs that must be "sterilized" at all costs. It is also shown that Felix has a defect that kicks in when he's faced with anything aged or antique because he doesn't understand the concept of antiques, and as far as he knows, they only collect dust.
After Felix was reprogrammed, he became obsessed with dirt. The only thing that Felix can say with both of his upgrades is "Dirty!", but with Felix he says it disgustedly, while with Oscar he says it happily.
Felix is currently obsessed with cleanliness instead of dirt.
Felix is a green anteater/elephant-like experiment with a small body, mouth, arms and legs, a thin long tail with a brushy fuzz at the end, a large head with a long tubular elephant/vacuum-like trunk that can suck up debris and fire lasers out, large black eyes, small short ears, four fingers on each hand and three toes on each foot, all ending in black claws, and three dark-tipped antennae arranged in a crest-like structure.
Felix can suck up objects and dust using his anteater-like trunk/snout and sweep with his tail. He can spin himself into a tornado to clean, and also shoot lasers out of his snout, which are used to disintegrate germs and small creatures. When he was reprogrammed, Felix could release the sucked-up dirt in massive bursts.
Despite Felix's cleaning habits, he had a problem with doing these tasks: he threw away anything, assuming it was trash, and tried to "sterilize" anyone, assuming they were germs. Felix was upgraded to try to be less of a neat freak. Instead, he turned into a dirt-maker (renamed Oscar), so Lilo gave him back to Gantu, who had previously abandoned him. He also "sterilizes" anything aged or antique in order to prevent it from collecting dust as seen in the Stitch! anime.
Felix appeared in his own episode in the Stitch! anime where Stitch summoned him so he could get out of cleaning the house. In this episode, it is shown that Felix has a defect that kicks in when he is faced with anything antique. However, Felix doesn't understand the concept of antiques, and as far as he knows, they only collect dust. Thus, his programming causes him to terminate anything aged in order to prevent the buildup of dust. In the end, he is reprogrammed to collect things that can be renewed and recycles them. His one true place after this is as a mobile recycling service. Felix makes another appearance in the Season 1 finale "Showdown with Hämsterviel" where Hämsterviel puts him along with Sparky and Angel under his control.
- Both of 010's names are a reference to the main characters of The Odd Couple.
- Felix appears, along with several other Lilo & Stitch characters, in a parody of the Disney Channel Original Movie High School Musical, which was broadcast as part of the High School Musical: Around the World one-year anniversary special.
- Felix's pod color is green.
- Felix is described by the experiment computer screen as, "Experiment 010. Primary function: Cleaner".
- Felix appeared on the DVD cover of Leroy & Stitch, along with Lilo, Stitch, Jumba, Pleakley, Doubledip, Fibber, Amnesio, Drowsy, Woody, Shredder and Ploot, with Leroy flying above in a one-man space shuttle.
- Felix's antennae appear in the online game Jumba's Lab.
- Felix's design resembles some monsters from the Ultraman series, such as Sartan (The Return of Ultraman), Zurzula (Ultraman 80), and Gazebo (Ultraman: Towards the Future), mainly because of their long noses and elephant-like appearance.