Nightwing
Nightwing was conceived as a Kryptonian analogue to the character of Batman, with Nightwings frequent partner Flamebird based on Robin. As first depicted in the story "Superman in Kandor" in Superman (Vol. 1) #158 (January 1963), Nightwing is an alias used by Superman inEdmond Hamilton-penned pre-Crisis adventures in the city of Kandor, a Kryptonian city that was shrunken and preserved in a bottle. In Kandor, Superman has no superpowers and, in the story, is branded an outlaw there due to a misunderstanding. To disguise themselves, Superman and Jimmy Olsen create vigilante identities inspired by Batman and Robin. Because neither bats nor robins lived on Krypton, Superman chooses the names of two birds owned by Supermans Kandorian friend Nor-Kan: "Nightwing" for himself and "Flamebird" for Olsen.
Pre-Crisis on Infinite Earths, the identity is created by Superman, when he acts as a vigilante during trips to the bottle city of Kandor. Post-Crisis, the name is attributed to a historic Kryptonian crimefighter; who serves as an inspiration for Dick Grayson when he sheds his Robin identity and assumes the name and a new costume.
