Ponyvania: Order of Equestria is a surprisingly great blend of Castlevania: Order of Ecclesia and My Little Pony in which you play a little pony who battles challenging enemies, collects loot and levels up as you attempt to save the kingdom of Chanterlot from Discord the lord of Chaos.
This is one of our favorite pony fangames. Legit.
Also coming soon to a wasteland near you.