Chooch is a pink cat, with a cream colored muzzle, and a long, bushy tail. The tip of his tail is either white, or black, depending on the material. He also happens to be the tallest of the alley gang cats. He wears a white long-sleeve turtle-neck sweater, and is often depicted with angular eyes similar to that of a Siamese cat.
Choo Choo is enthusiastic and devoted to TC, even when he’s clueless as to any of TC's ulterior motives and schemes. He tends to be a sensitive, hopeless romantic, however unlike Top Cat or Fancy-Fancy, Choo Choo has no courage talking to girls. He tends to be rather prone to anxiety and insecurity, often doubting himself when it comes to potential mates.
- He lives at the fire house as the fire house cat as seen in Hawaii, Here We Come.
- In T.C. Minds the Baby he claims that he has an older sister who has kids.
- It's possible that he's still dating Lola Glamour after the end of Choo-Choo Goes Ga-Ga based on a comment in King for a Day.