Nightwing is one of Batman's sidekicks and former wards in Batman Ninja.
History[]
During the night Gorilla Grodd's Quake Engine went off at Arkham Asylum, Nightwing, along with Robin, Red Hood and Red Robin, was sent back in time to Feudal Japan.
Upon arrival, Nightwing, Red Hood, Red Robin and Robin were helped by the Bat-Clan led by Eian in finding Batman during his battle with Joker on the sea, which led to the Joker and Harley Quinn temporally losing their memories in an explosion, but later regained them.
Two days later, Nightwing assisted his old mentor in their battle with the villains with the help of Eian and his Bat-Clan, Catwoman, and successfully defeated them. With the villains captured, everyone returned to the present where Nightwing and the other sidekicks delivered the captured villains to James Gordon.