Good range of difficulty so anyone can play. They do have some nonpony songs thrown in there but they tried to pick songs that fit the overall theme of ponies (or have great pmvs) but you can always take those out if you want. They have rhytm is magic and chrystalize packs and themes out. Trotmania - Tons of songs (over 100) and has themes for stepmania 5. The original spot they were released is offline but it is being hosted on a few websites just google for it and you should find a download for it. There are 20 songs total and I believe they came in two separate downloads containing 10 songs each.
My Little Pony Season 01 pack - Love the songs and they are expertly stepped. Just so you know I only play pad so opinions are based off that. Here are the ones I know about and my general thoughts. I'd love to know where to find some good packs to play or just a single chart that you thought was good.
Hey there is little talk of pony packs in this thread.