Dr. Hämsterviel is the main antagonist of the Lilo & Stitch franchise, first appearing in the 2003 film Stitch! The Movie. He is the megalomaniacal former partner of Jumba Jookiba, whom he assisted in the creation of illegal, genetic experiments. Contrast to his diminutive size, Hämsterviel is cunning and ruthless. His primary goal is to harness the power of Jumba's experiments so that he may overthrow the Galactic Federation and rule the universe.