Robin, also known as Dick Grayson, became Nightwing as a symbol of his independence and maturity. He wanted to step out of Batman's shadow and establish his own identity as a superhero, with a new costume and persona to reflect his growth and evolution as a character. This transition allowed him to operate as a more independent and capable crime fighter in the DC Universe.
In the comics, Robin was the leader, and remained leader after becoming Nightwing.
Nightwing (Dick Grayson) is a person who was once Robin. Nightwing was the first Robin, Dick Grayson. When he became Nightwing, the spot of Robin was taken over by Tim Drake. Therefore, Nightwing and Robin are the same people.
In the teen titans, you see robin in the future in episode "how long is forever", but other than that they don't show Nightwing.
No. Robin does turn into Nightwing, but not because he is bad. Nightwing is still an ally of Batman.
No. Nightwing is the original Robin when he was older
Dick Grayson is Nightwing. He protects the city of Bludhaven.
No, neither Nightwing nor Batgirl have children.
Nightwing
No and the first robin was called nightwing
No, he used to be Robin the sidekick of the Batman
no, but Nightwing is
There are many people who have been Robin in the DC universe, but the most recognizable Robin was Dick Grayson, who is a former circus performer turned orphan. Bruce Wayne took him under his wing and they fought together for a while. Dick Grayson eventually abandoned the Robin alter-ego to become Nightwing.