Pinkie Pie had rented a small cottage at the edge of Ponyville. There are two back doors. On the attic she found a few exciting items and a few interesting rooms in the basement, this is where she decided on opening up her own dungeon.
I just recently started to write stories directly towards the FiM actively, though I have been writing for years, publishing numerous stories at Mibba and the eventual pony story, as far as to the MLP