Twilight Sparkle: Let's find out what's wrong with Pinkie's brain.
Twilight once more decides to examine Pinkie For Science!
. This time, she tries to figure out just what's wrong with Pinkie's brain. Unfortunately, something goes wrong. Now Pinkie Pie's alter egos have been set free from her mind and are runing amok throughout Ponyville. Worse yet, the original Pinkie Pie has been rendered — GASP!
— normal! Now her friends have to track down the pieces of Pinkie Pie's mind and put them back where they belong before things get too out of control.A Piece of Pie
is a My Little Pony: Friendship Is Magic
fancomic posted on deviantART
by MohawkRex. The original can be read here
and a colored version by whysoseriouss can be found here.