Thank you so much for your nice comments! I'm so glad you enjoyed it. Hehe, it was a lot of fun to write the Rarity and Applejack section, too.
I used sfxr to make my sounds! It's super old and theres probably better stuff out there now, but it's really easy to use and it can make some pretty neat sounds. I didn't have much of a process to it, really. I think they were all square waves, and I tried different pitches and different effects like rising or falling pitch for each character. Just sort of experimenting and seeing what feels right.
Thank you again for so many nice comments! This was such a wonderful thing to come home to.