....Colubrids do! ....and it's pretty bad actually! Well, at least compared to ball pythons or other species. The poo of a colubrid is often more watery as well and it "smells" longer if you will. I've had cornsnakes that will make a bedroom smell like a truck stop gas station in a mere 15 seconds.
Honestly, Ball Pythons are probably one of the best "non smelly" snakes I would say. Boa's aren't terrible either but the urates can get pretty smelly if not removed right away.