Board Thread:Young Justice News/@comment-1038387-20121112221811/@comment-1038387-20121129163822

Dick first became Batman during Batman: Prodigal.

Also, Tim is actually Red Robin III... I forgot about that.

Not counting the original, adult Dick Grayson from Kingdom Come/Earth-22, the first Red Robin was Jason Todd. He got the costume while he was on Earth-51. It was that world's Jason's before he died. He used it for a while. Then came Ulysses Armstrong, the General and second Anarky. Only then did Tim start using it.