Prior to coming to Hogwarts, Harry found himself drawn into the Brony-fandom. Now armed with magic and horrified at the state of the Wizarding World, he set out to make the world more like Equestria by giving each student at Hogwarts his or her own pony version of their-self. Trying to teach the next generation the values he had come to treasure. He succeeds but not entirely as he had intended. Now Herald of the Royal Pony Sisters it is his and his fellow Bronies responsibility to not only reunite magical and none magical world but also prevent power hungry politicians from doing something stupid beyond comprehension. Thanks a bunch Potter-luck.