He's actually meant to be around the same age as Tim Drake, who in the Young Justice series was a bit thin, the reason for the Robin-like costume is because in the comics he was originally intended to become the third Robin, but the idea was thrown away after Tim Drake took over.
Jason Todd is alluded to, Tim's costume was in the case then when Tim took it Dick's was placed in the case (remember Jason wore a duplicate of Dick's originally, even if Dick wore Tim's first suit turnabout was fair play) it probably happened offscreen during the years Superman was first airing, Batman had taken a two-year break from 1995-1997 so other events could have happened there too. It's just Babs got to work with Tim as Batgirl, the Oracle events wouldn't happen until later
I don't hate the designs of any Dc character but saying your a bit better, most of your drawing of the Dc characters wins compare to what they done so far in the comics. If you made a series of your drawing like in batman the animated series I say it can last just as long as that did
Yeah, he didn't look too good... However, after some wiki poking, I found out he was introduced a month before Tim Drake became Robin, and they intended for him to be the third Robin.. But then they said "FUCK IT" when Tim Drake started wearing the yellow cape.