Spooky, A.K.A. Experiment 300, is an illegal genetic experiment created by Jumba Jookiba and a character in the Lilo & Stitch franchise. He is designed to terrorize his victims by morphing into their worst fears; his forms are distinguishable by his glowing green eyes and hissing voice. His one true place is scaring trick-or-treaters on Halloween and (for the rest of the year) haunting the old, abandoned mansion.
Befriended in other series
Note: this is only a parody and most likely will never happen in real series
Outside of Lilo and Stitch series, his current 'ohana and a new friends were Finn Mertens and his partner Jake the Dog (from Adventure Time). He was originally discovered by Finn, while he was traveling on an abandoned house in the middle of the forest, for his mission to retrieve the lost crystal, which Princess Bubblegum accidentally lost it. While on his mission, Finn accidentally tripped over Spooky, causing the latter to shapeshift to Finn's greatest fear; 'fear of the ocean. While Finn was afflicted by Spooky's transformation, his partner, Jake entered the scene to check if he is already succeeded on his mission. When he entered the scene, Spooky tried to scare him with a monster bigger than him while Finn left being tied up, and from there, Jake also being afraid of it and confronted the big monster on telling where is Finn... However, Jake noticed an unusual behavior and an eye to the said monster, so his fear was changed to doubts, when he questioned the monster that how did it changed its eye color which according to him, its an unusual for a big monster unlike they've fought before. Finally, with no other option, thr big monster reverted back to its original form, which Jake later laughed the situation. After many tries of scaring him away again, Jake became bored to his antics and started to capture him, and he succeeded, forcing him again to answer on where did he brought Finn? After he retrieved Finn from being tied up, Jake told Finn that the green alligator spooky looking creature was behind all of their fears, which makes Finn mad at him at first, until Jumba Jookiba showed up to them and told that the creature they've fought and encountered was none other than a genetic experiment created by him, it was "Experiment 300" or "Spooky". After learning its abilities (whenever it faced someone, it will shapeshift into anything that people was been afraid of all their lives), they've decided to took him, but this time, since it was him, even if he turns into their thing which they most afraid of, they're not scared of him anymore, and a ccepted him as an honorary 'ohana and an adventurer too. Currently, Spooky is staying with Finn, Jake, and BMO, which most of the time spending time scaring anyone who attempts to attack Finn and Jake on their adventures, and also guarding their home while they're gone for some mission.