Spooky, A.K.A. Experiment 300, is an illegal genetic experiment created by Jumba Jookiba. He is designed to scare his victims by morphing into their worst fears. His one true place is greeting and scaring trick-or-treaters on Halloween, and (for the rest of the year) haunting the old, abandoned mansion.
Experiment 300 was the 300th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to terrify his enemies into submission by morphing into their worst fears. 300 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, with 300's pod landing on a house roof.
Sometime later, 300 arrived at the Pelekais' house, where he terrified Nani by turning into Cobra Bubbles and claiming he came to take Lilo away. However, when Lilo and Stitch returned to the home and noticed Cobra to be 300 from his hissing voice, they exposed 300, named Spooky, as an imposter, forcing him to retreat.
Lilo, Stitch, Jumba and Pleakley followed Spooky into the old, abandoned mansion. Spooky startled Stitch, who unintentionally fell into an indoor swimming pool. He then surprised and terrorized Lilo by turning into a clown, then defeated Jumba and Pleakley by turning into their worst fears: Pleakley's mom and Jumba's ex-wife.While Stitch was sinking in the pool, Spooky chased after Lilo in his clown form, scaring her to the point where she hung onto a ledge screaming for help. Stitch eventually overcame his aquaphobia by singing "Aloha Oe" (a song Lilo taught him as a coping method), and emerged from the pool. He then rescued Lilo in time.
When Spooky noticed that Stitch had faced his fears, and was thus not affected by any of Spooky's forms, the former turned into a bat and attempted to escape up the chimney, but was trapped by Stitch in a containment orb.
Spooky was then found a one true place scaring trick-or-treaters on Halloween, and (on other occasions) haunting the abandoned house.In "The Asteroid", Spooky was one of the six experiments whom Stitch convinced to come with him and Lilo to save Earth from an approaching asteroid. During the journey, Kixx kicked the back of Spooky's seat, causing the latter (using his ability to morph into nightmarish forms) to retaliate. Spooky later attempted to use a monstrous form to scare Pleakley into giving him free soda, but Pleakley only replied with an order for Spooky to return to his seat.
The first 624 experiments, including Spooky, 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.
Spooky participated in the following battle between the experiments and the Leroy clones by using nightmarish forms to scare Leroys.
However, 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 fail-safe.
Spooky made an appearance in the Stitch! anime when Hämsterviel sent him along with Toons to scare the children of a summer camp. It is shown that he uses a form of telepathy to read his victim's mind and discover their fears. In "Shogun", it is shown that Spooky was dehydrated back into an experiment pod and locked in Jumba's vault.
In the form of an individual or other creature, Spooky is completely indistinguishable from the real thing, except for glowing, olive-green eyes and a hissing voice.
In his true form, Spooky is a green blob-like experiment with glowing, olive-green eyes, a wide mouth with a turquoise tongue, a hissing voice and three round, short, stubby spikes on his back, greatly resembling the other Disney (and Halloween based) character Oogie Boogie.
Spooky can shapeshift/morph into his victims' deepest, darkest fears by taking the form of any person, animal or object. How he knows what his victims' fears are without finding out anything about them, though, is unknown. Spooky also turns elastic when moving. He uses a form of telepathy to read his victims' minds and discover their fears.
Spooky has morphed into many forms. These include:
- A cat
- A dog catcher
- A fat, elastic, slug-shaped version of his true form
- Headless Lilo
- A giant spider
- Cobra Bubbles
- A clown
- Mrs. Pleakley (twice)
- Jumba's ex-wife (twice)
- A water monster
- A twister
- A Pupil-Eating Pass Monkey-like creature
- A bat
- A giant python
- An asteroid
- A spiky, sea urchin-like fruit
- A version of his true form with massive fangs
- A large, nightmarish, muscular version of his true form with an alligator-like snout
- A Goo Gobbling Booger Beast (from The Origin of Stitch)
- A zombie
- Angel (when she's angry at Stitch)
- A Tigerlily dinosaur-like creature
As Spooky's ability to turn into his victims' worst fears is his only weapon and defense, if one overcomes their fears, Spooky will be rendered defenseless.
- Spooky greatly resembles the Disney (and Halloween based) character Oogie Boogie.
- Spooky's disguises can be seen through them by his glowing, olive-green eyes and hissing voice.
- Spooky has glowing green eyes instead of black ones like most of Stitch's other cousins.
- Spooky's pod color is green.
- Spooky is described by the experiment computer screen as, "Experiment 300 Primary function: Morphs into the victim's worst fear".