Fritz is a main character in the movie, voiced by Gregory Snegoff. Fritz was a homeless big black terrier, who went on Titanic, and became a leader and protector of most of it's animals, except for Gertrude's cat, Geoffrey, and Corynthia's Chihuahua, Tiger, who became outcasts friends and partners actively opposing the rest of animals, and constantly menacing mice, especially Maxie and his parents, as Geoffrey wanted to eat them, and Tiger helped him. Fritz and other animals disliked the two. 