It sounds like you're referring to — better known as Stitch — from Disney’s Lilo & Stitch franchise.
In the movie’s lore, the mad scientist Jumba Jookiba created 626 genetic experiments, each designed for a specific purpose (like causing chaos, destruction, or other traits). Stitch is Experiment 626, designed to be nearly indestructible, super-strong, highly intelligent, and programmed to cause chaos. lilo and stitch experiment
