The Light Of Harmony: A Kingdom Hearts x My Little Pony Crossover

Long ago, before the kingdom of Equestria was settled, there was a library that housed many books telling of ancient tales and folklore. Some of these manuscripts were mainly wrote to entertain, while the rest were research materials on certain entities. One such entity, whose true name was forsaken after it gave in to the powers of Darkness, went out to seek an ancient power believed to have disappeared at the dawn of creation. This power was said to be able to change the very laws of order and harmony, leading to it having been locked away. The entity, who would later become known as Harbinger, would one day return with an army of dark creatures who would seek to steal the hearts of all. However, the legend goes on to declare that several hero's will be chosen by the Light after being given the tools required to defeat this dark army. If the power of Kingdom Hearts is unlocked and released, only they can lock the door once more to save the worlds of Light.
"May your Hearts be your Guiding Keys..."
My Little Pony belongs to Hasbro
Kingdom Hearts belongs to Disney and Square Enix