This is my entry for the Remix War II.
Awesome InfinityDash - http://www.youtube.com/user/infinitydash
Original song - http://www.youtube.com/watch?v=g-4_kklM-Kg
Download link - http://www.mediafire.com/?d882al13oon56um
Or just grab the whole album -- http://pinkiecake.bandcamp.com/album/pinkie-cake-for-mass-murder

Long story short:
Wanted to create a dubstep remix, failed.
Wanted to create a drum and bass remix, failed.
Accidentaly changed the tempo, remembered speedcore.
Forgot about the deadline of the first Remix War, FAIL!!!
Invented Pinkiecore!
Submited for the second Remix War, happy!

As for the picture: I found it in ponibooru and there was no source, so I can't give credit for who made it :(