One-Eyed Jack

In the episode, The Horror of Slumber Party Mountain, One-Eyed Jack (voiced by Frank Welker) is a dumb hulk of a rabbit who is excluded by his kind. One day, Jack is run over by a truck driven by a taxidermist. He takes Jack to his studio and remakes him with a pair of antlers into the jackalope monster that he is today. When the taxidermist kisses him, Jack wakes up and escapes into the forest. Jack captures Buster, Babs, Plucky, Shirley, Hamton and Fifi and locks them all in the dungeon. Jack turns out in the end to be Elmyra in disguise, who just wanted to cuddle them, but they all escape instead.