Trying to undesrtand Pinkie better Twilight performs a telephatic spell but instead of getting inside her mind, she accidentaly switches bodies with her. Now Pinkie has all of Twilight´s magic but none of her responsible attitude.

Inspired by Yourenigma great piece: Twilight´s minds is a curious place, go check it out!: http://youtu.be/1SwrR1rLnzA