Since the Golden Age of DC Comics, Batman has almost always been accompanied by one of his many young sidekicks, the Robins. In his earliest adventures, The Dark Knight was famously assisted by Dick Grayson, the first hero to adopt the Robin mantle, and one of Batman's closest allies to this day. Should the Caped Crusader of Gotham ever become a serious threat, Grayson might be the only hero who could stop him.
Source：https://www.cbr.com/dc-comics-nightwing-can-defeat-batman/
