Why did the changeling army choose to invade Canterlot during Princess Cadence and Shining Armor’s wedding? The answer can be found in a chance meeting between Queen Chrysalis and Nightmare Moon, back at the Summer Sun Celebration …
Why didn’t Princess Luna come to help fight off the Changeling invasion during Shining Armor’s wedding to Princess Cadence? Now we know - she was having a few problems of her own in an alternate universe where Nightmare Moon ruled unchallenged!
Something has gone wrong with the Crystal Mirror and it just so happens to be on a day when Princess Twilight is rolling out the red carpet for Princess Ember. Could Twilight have made a mistake when she rigged up Celestia’s book to the portal?