The newly coronated Princess Twilight Sparkle discovers that the only reason she became royality was so that Princess Celestia could do merchandise of her.
Luna is sick and can't go after her job of managing the moon and the night anymore. A replacement must be found—even if that replacement's first thought is whether the moon is really made of cheese.
What is it with Religion? Rainbow Dash gets a Bible and decides to analyze it to the core to see how much there is about this subject. The result is clear.