Did Ben Affleck know about Batman's Dog, Ace the Bat-hound? Well, now he does since he's played "Pup Quiz" on The Tonight Show. In the segment, Ben Affleck, who stars as Batman in Batman v Superman: Dawn of Justice, and Jimmy Fallon played a trivia game where they were asked animal-based questions. Fallon gave away puppies as prizes. Jimmy did a bit better than Affleck, at one point covered in puppies. However, Ben ironically won the Superman puppy.