Ace is a German Shepherd who is Batman's faithful assistant. Ace first who appeared in the Batman comic books in the 1950s, and has been reincarnated many times.
Ace the Bathound was first introduced in 1955, and was inspired by Krypto the Superdog who kickstarted the popularity of superhero dogs. Ace has appeared in many of DC's animated works, most notably in Batman Beyond and the aforementioned Krypto the Superdog. Ace has not yet appeared in any live-action Batman movie, but there are plenty of opportunities for him to do so. Ace the Bathound is perfect for any dog, big or small.