Principal Cinch, after suffering the humiliation that was the First Challange of the Friendship Games, has decided to resort to fight fire with fire, by forcing Twilight Sparkle- student extraordinarie and researcher of magic- to unleash the power she has sealed inside a peculiar device.
The trouble is, there's no garauntee that said magic will actually make the user stronger... or limit its effects to the bearer.
Alternate ending of the "The Friendship Games" EQG movie. Contains physical regression and, later on, diapers. Ye be warned.