Spike, A.K.A. Experiment 319, is an illegal genetic experiment created by Jumba Jookiba and a character in the Lilo & Stitch franchise. He is designed to alter the intelligence of entire populations by increasing their silliness by 99%, leaving them only 1% clever for the next 48 hours. His one true place is in Pleakley's E.A.R.W.A.X. group, hugging and thus taming truant experiments, after he is given protective armor to cover his goofiness-inducing spines.
Befriended from another 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 friend is Lightning McQueen (from the series/movie Cars).