For Nightwing's full console character biography, click here.
- Nightwing's real name is Dick Grayson (though his birth name was Richard Grayson; and one of his ancestors was one of the assassins Talons that belongs to the Court of Owls), and he was the original Robin.
- Regime Nightwing's real name is Damian Wayne, and he is the son of Bruce Wayne and Talia al Ghul (Ra's al Ghul's daughter; which makes Damian his grandson).
- He is one of the only characters to not have a Challenge or Online Mode character (alongside Lex Luthor and Cyborg), although he has a Phantom Zone card, Nightwing/Batman Ninja.
- Nightwing is the first character to have at least one card in all four tiers: Bronze, Silver, Gold, and Nth Metal, later followed by Catwoman after the release of Catwoman/Batman Ninja.