Dr. Jacques von Hämsterviel is a main antagonist of the Lilo and Stitch franchise. Hämsterviel's first major appearance was in the film Stitch the Movie! where he begins his plans to take over the galaxy. Hämsterviel is the former partner of Jumba Jookiba who later becomes one of his enemies. He also use to want to capture the Experiments to use for evil, but then thay all turned from bad to good, which made them useless for him. Now he gains control of the Heartless with help from Maleficent.