Luna returned from her banishment to sail the seven seas for a millenia, back into the safe embrace of her sister, but she kept a secret, a secret of her being the one thing Celestia truly hates. A pirate. Luna learns that the seas were better than the boring drab life of Canterlot. Pipsqueak Always wanted to be a pirate, ever since Princess Luna came back when he was just a foal, and Luna comes, and grants his wish. The adventure the proceeds!
Featuring Luna!
Okay, slightly crossover, but all in all it has its own storyline
Teen for Action sequences and reference to sex and scary things
Alternate univervirse due to the fact that Luna was never sent to the moon, and the elements of harmony don't exist..
More main characters are there, but I'm only aloud 5. XP