I don't know if this ever came up before, but does any fan of the Teen Titans know the true identity of Red X? My theory is that he is Jason Todd, because Robin's exact otherworld conterpart was Dick Grayson and on Beast Boy's chart it indicates the Titan Robin becomes Nightwing later, so...

This discussion is prolly waaay out of date, right?

I'm pretty sure they never difined who it was, and never really intended to. I think the character only exsisted to be a physical reminder of the bad choices Robin made in the past.

Thought I have no idea why he showed up after his first apperance.

I think Eggbert's right.

I honestly think they fell in love with the character design they made for Red X and wanted to use it some more, but didn't want to bother explaining how. The design really was kind of cool.

Plus it's one more character they didn't need to get a voice actor for.