Talk:Twilight's Kingdom - Part 1/@comment-3410511-20140506051346/@comment-24908786-20140507013041

http://www.derpibooru.org/619590?scope=scpe1dae8ec08efd54ef005a926045271f61f56f33a4

It looks like it. He's the Pony of Shadows from Castle-Mania.