Kind of a spinoff of cupcakes, granted Pinkie Pie has a whole facility of ponies.
Contains some violence and blood in later chapters, but nothing you would not see in a PG-13 movie. Please consider this before reading if you do not like these kind of things.
This is my first pony story, so criticism is very much welcome!

Rainbow wants her revenge.
Nothing will get in her way.
Not even Princess Celestia.