Experiment 133, also known as "PJ," is a character from the "Lilo & Stitch" franchise.
PJ is a small brown experiment with big glasses, big ears, a fluffy yellow tail, and a brown moustache. He was created by Dr. Jumba Jookiba during his genetic experiments. He has a cheeky personality and his presence brings a range of mischievous circumstances and challenges for Lilo, Stitch, and their friends.