Why did Pinkie go insane, and turn into Pinkamena? It all goes down to pegasus pony from Cloudsdale; Surprise. After she came to Ponyville, she started to replace Pinkie. Even the mane 5 seemed to replace Pinkie. It wasn't long until Pinkie snapped..
This adventure started out with a flat mane, and the notion of beaming. Now you see a community of smiling Ponies, and I hope they will. Only this isn't so much of ponies, but myself, and the once living on the other side.
It is all thanks to Luna and the vision she dropped on my head that one fateful night. Now I have a choice and a mission to carry out. Only someone is about to lose his head over it.