While strolling around town, Twilight Sparkle accidentally knocks out Derpy's contact lenses, revealing perfectly normal eyes hidden underneath. So what else could Derpy be faking?
Every day, Princess Celestia wakes up in terrible pain, and every day, she chooses to endure it, until the one day she's left feeling blissfully normal. Few things have ever scared her so much.
Everyone's feeling sorry for Scootaloo because she has no parents, lives in a cardboard box, and eats gruel all day. Well, they're stupid. And also dumb.
Luna rules the night. So when Celestia returns to the castle in a bad mood after Twilight's failed dinner party with Starlight, the night princess knows it is her duty to set her sister's mind at ease (as well as the minds of a few other friends).