Pinkamena Diane Pie, to the normal outsider, is just 'Pinkie'. But to the ponies in the know, she is a cold-blooded killer, trained in merciless combat, and certainly NOT a party pony. However, Pinkamena has not used her powers for nquite some time, not since... THEn.
But when Duty calls, will the mare answer?
Crossover: Pinkie Pie and Splinter Cell (books)