Disney: Lilo & Stitch
Stitch, also known as Experiment 626, is an illegal genetic experiment created by Jumba Jookiba, one of the titular protagonists of the Lilo & Stitch franchise alongside Lilo, and the most prominent lead character of the franchise overall, appearing in all major media. His original primary function is to cause chaos across the galaxy by destroying everything he touches. He is designed to be abnormally strong, virtually indestructible, super-intelligent, and very mischievous. His one true place is with Lilo and her ʻohana.