Here is some awesome pony themed ska I recently found.

[Rarity Is Best Pony 634]

Having been around the fandom for a while I thought I had heard most of the genres people had made pony themed music from, well I was wrong as I have found some awesome ska/punk music.

 

 

[Fhaolan 4,483]

Since this is music you found, rather than created yourself, I'm thinking Recommendations is the best place for it.

[Winter Rose 36]

Ska eh? Then I'm sure you've heard of J. Carlson. I have some other stuff to share.

https://www.youtube.com/watch?v=ZhJMijtC4O4

 

There's probably more out there if you look hard.