In the world of superheroics, a major part of making it to the big time is knowing how to fight (or having powers that can hide the fact that you don't know how to fight). No one would be afraid of Batman or his cadre of sidekicks if none of them knew how to throw a punch. But, thanks to the endless hours of training they do, the Dark Knight and every teen he hangs out with has mastered at least a few fighting techniques. This lets them take on Gotham's criminals, as well as supervillains, aliens, and whatever else the universe throws at them.