Young Richard John "Dick" Grayson was adopted by Bruce Wayne after his circus performer parents were killed by criminals led by gangster leader Tony Zucco. Once he discovered Bruce's secret, Dick became Batman's sidekick Robin and fought crime alongside him for several years. After an argument with Bruce following a near-death experience facing the Joker, Dick left Gotham City and formed a new superhero team called the Teen Titans. He continued his alias as Robin until he was mentored by Superman, whereas he became inspired to create his new personal title of Nightwing. He occasionally returns to Gotham City whenever Bruce needs him most, and stands as an ally of Batman once again.
In LEGO Batman 2: DC Super Heroes, Robin's alter ego is named "Dick Grayson" as a mistake. However, at this point in the continuity, Dick is Nightwing. According to LEGO.com, Robin is Tim Drake in LEGO Batman 2, as Robin's civillian identity is shown as Tim Drake in the game. However, they updated the website to say Dick Grayson to match the game.