With the takedown of MLP: Online, the entire pack of sprites for the game have been released to do whatever you damn well please with. It's a pretty massive bundle of ponies, with piles of animations per as you can see from the image above. Each one has a full set, including variations based on what they are wearing (robe and hat versions in Trixie's case).
Head on over here to grab them! If you have a pony game, or something pony related you are working on, they might come in handy!