Player Handbook
in My Little PonyThis is where you will find all the different rules you need to know to play a character in My Little Pony. GMs should know this stuff too, but it's mostly for the players to make decisions about how to build up and play their characters.
Need to know what benefits you get from playing a Unicorn? How about what gear your character might carry? Or maybe you just need to know when Laughter ponies get a benefit for making the GM laugh? You can learn all of that in the various articles found here.
(Seriously, being a Spirit of Laughter pony is the best! you get to break up the seriousness with your friends by saying funny jokes like "What do you get when you cross a dragon with a pony? ... Scorched!!!" because you know you should never cross a dragon. And do you know why you should never cross a dragon? Because they can be a little Hot Tempered!! The point is you should really consider having a Laughter pony in your party.)