WATCH THIS SHIT
Srsly.
Holy shit.
Main characters are Earth Ponies, Unicorns, and Pegasi. AND GRIFFONS.
Ponies have the advantage of being more adaptable, but none have shown magic powers.
Unicorns have some innate magic power.
Pegasi can fly and grow up in a city in the clouds.
Griffons are strong and good at flying, but are anti-social and have lower amounts of friendship.
In the show they run into Dragons, Manticores, Hydra's, civil war's, and other things I didn't really expect from a kids show.
At one point they join in a war between Ponies and Buffalo.
Also, I'm pretty sure Pinkie Pie is a text-book Malkavian.
OH OH, and Friendship points could be awarded like Willpower from New World of Darkness. They would be awarded for working together with your allies despite it hurting your intentions, and convincing enemies to not kill you.
OH OH and cutie marks would incorporate classes.
EDIT : OH AND YOUNG DRAGONS COULD BE PLAYERS. And they use dragon magic and stuff.
OHOH AND THE WAY TO REGAIN FRIENDSHIP POINTS WOULD BE THEY HAVE TO WRITE LETTERS TO PRINCESS CELESTIA ABOUT HOW THEY DISCOVERED FRIENDSHIP