Pinkie pie wishes for cupcakes, but with every cupcake she eats, her mental state drops to a psycho level. thus begins Cupcakes
Rainbow Dash wishes to be the fastest pony in equestria, but once she starts, she can't stop, even if she tried
Fluttershy wants to care for every critter in equestria, but ends up trampled by the stampede
Applejack wishes for the best apples in equestria, but they are full of a slow-effect poison
Rarity wants to be the most famous designer, but gets crowd crushed by over obsessive fans
Twilight wants to be more powerful, but her powers are uncontrollable
Playing all twisted metal's, I know how Calypso works and how he screws over noble wishes