Get Over It (An MLPEG/Sonic/TMNT Fanfic)

Garrett Shimmer, the younger brother of Sunset Shimmer, has had a crush on Twilight Sparkle since he was 12. But when Twilight doesn't reciprocate Garrett's romantic feelings for her due to a committed relationship, Garrett learns firsthand the experience of unrequited love, while also doing his best to not drive a wedge between Sci-Twi, Sunny, and their boyfriends Leo and Raph. As Garrett tries to move on, his life gets strange when a certain blue alien creature from another dimension comes out of nowhere. Maybe this blue hedgehog could help Garrett with his love life.
From the author of Robin Warner's Excellent Adventure and The Sunset Redemption
My Little Pony Equestria Girls inspired by characters developed by Lauren Faust
Teenage Mutant Ninja Turtles created by Kevin Eastman and Peter Laird
Sonic The Hedgehog created by Naoto Oshima and Yuji Naka