When did Barbara Gordon ( batgirl ) first meet Dick Grayson ( Nightwing ) '' On young justice '' <<<<

Dick is first seen with Barbara at school in the episode Homecoming. She's shown afew plus times, and she is Batgirl in Invasion.

Prp in school when they where kids :)

Maybe around 9 yrs old:)

we don't know exactly when they first met but we know that they have known each other at young ages. We know that they were Friends in high school. That's as far as they montrer her in Dick's life
But it is known in other shows that he was around nine, when he was adopted par Bruce Wayne that they were introduced to each other

OK it is never really a dit but the 1st appearance of Barbara and dick in the same seen and at the same time was when it was Artemis 1st jour at school and Barbara gets jealous at dick taking a photo of him and art then later on in season two Tim canard, drake and Barbara come back in young justice invasion

They meet in the episode homecoming I think, where barbara is in a cercle of Friends with artemis, when richard comes up and takes a picture of Artemis and Barbara seems jealous.