The Cutie Mark Crusaders are one of my favorite parts of MLP:FiM. And I love the background song known as Cutie Mark Crusaders Go Crusading. So I was very pleased to find that MillenniumFalsehood wrote and shared a great piano version of the song.
You can find the sheet music here. You can also download a Musescore file or a midi version. All three are great resources for any piano-playing pony enthusiasts out there, or for anyone trying to earn a piano cutie mark. Thanks, MillenniumFalsehood!