Dukeson Leonard "Dukey" Test is Johnny's pet dog brother and the deuteragonist of the show. Johnny got him as a birthday gift for his 11th birthday and he was later mutated by Susan and Mary, giving him the ability to speak and walk on two legs.
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)
