Equestria may be the homeland of ponies, but it is not where they came from. Ponies came from a world so distant and far-gone that none now live who remember it. But this is not the story of that place.
Ponies move from world to world, though they spend so much time on each world that nopony ever knows they are not the first ponies to leave their world. And leave they do, for the ones who made them have a plan for the ponies, and they often test to see if the ponies have fulfilled the plan.
The test is a purple pony princess, a change nopony ever expects and, thus far, nopony ever accepts. This is the story of what happens when the Purple Pony Princess Test is given, and fails.
This is the story of Purple Pony Princess Test #7.