Dusk Shimmer is the son of Twilight Sparkle, from the TV series, My Little Pony: Friendship is Magic (if you haven't watched it, it's really good, be sure to tell all your friends about it).
He was created when Sonic went to Equestria, from my fanfiction, Sonic Goes to Equestria, which currently holds a rating of 3.9 on
fanfiction.net.
He was born when Sonic impregnated Twilight Sparkle, after Celestia and Luna were captured by Nightmare Moon. His known achievements are slaying an evil ocean, casting the Lich king down, and learning how to walk.
His shoes were given to him by his mom, Fluttershy, who thought he needed to be "about 20% cooler".
His catchphrases are "holy shitsnacks!", "mathematical!", and "chk! chk! chk!", although he only says that last one because he has Tourettes Syndrome and can't control it.
Because his mom, Rarity, is a unicorn, and his father, Discord, is a %