Leroy, a.k.a. Experiment 629, is essentially the most aggressive and the nastiest of all of Dr. Jumba Jookiba's experiments. This creature's appearance is similar in design to the 626's normal and combat form except for the bent antennae, yellow teeth, frilled ears, and red fur. He has the ability to disguise himself as 626 by changing the color of his fur and minor physical alterations of his teeth and ears and is a lot more physical than 626. He may be stronger than Stitch, Jumba did program a very unusual failsafe into him: when he hears Aloha ʻOe his systems completely shut down and cease, rendering him susceptible.