A long time ago, someone had the idea, "What if there were someone that was exactly like Batman...but EVIL?", and everyone else looked around and said, "That's a GREAT idea! We'll make our own too!" Just off the top of my head, there's Killer Moth and The Wrath and Owlman and Prometheus and Batzarro and Catman and who knows who else. But oddly, not a single one of these characters had an anti-Robin...
...until Scorn came along.
Scorn, aka Andrew Mallory, is a sidekick - and younger brother - of Wrath who first appeared in an episode of The Batman called "The End of the Batman"(February 2008).
He didn't appear in comics until Detective Comics #22 (September 2013), this time as Clyde Anderson, no relation to Wrath (but still his sidekick), and possibly one of several people using the Scorn name. Unfortunately, his costume is ridiculous compared to the original, but that's because the New 52 hates fun.