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This is a really dumb headcanon I’ve got going on, that Cloudy Quartz (AKA Pinkie Pie’s mom if you’ve forgotten/didn’t watch the show-sort of like me, lol) and Ms. Harshwhinny have been rivals since they were young. Even as they’ve become cougars, they still have a very “healthy” rivalry going on behind the scenes. So healthy that Harshwhinny decided to drag Cloudy Quartz to a mud pit to wrestle it out.
 
It looks like it wasn’t a good idea…