Chronicles of Mythrodak: Quest of the Moonstone,

Prince Mythrodak joins a team of odd ponies to try to retrieve the moonstone, the missing stone in celestia's treasury.

Prince Mythrodak is on the run, his father was killed by celestia's forces for reasons he doesn't know, in doing so he meets seven ponies who are very odd, they are on a quest to recover an ancient moonstone, and on the way they run into some dangerous, some weird, and some downright hilarious predicaments