He-Horse and the Mustangs of the Universe by MykeGreywolf

“I am Bulk Biceps, prince *ahem* of Equestria and defender of the secrets of Castle Greywolf. This is Fluttershy, my fearless friend. Fabulous secret powers were revealed to me the day I held aloft my magic sword and said, ‘BY THE POWER OF GREYWOLF! YEAAAAAAAAH!!!’. Fluttershy became the mighty Battlemare, and I became HE-HORSE, THE MOST POWERFUL PONY IN THE UNIVERSE!!!”