Mighty Man and Yukk Millionaire Brandon Brewster (voiced by Peter Cullen) uses a machine to reduce himself to only a few inches in height and give himself superpowers; in this form, he's the costumed crimefighter Mighty Man. His partner is Yukk (voiced by Frank Welker), the world's ugliest dog; this shaggy, bipedal creature conceals his face by wearing a miniature doghouse over his head.