Twilight Sparkle has finally perfected a device allowing ponies to speak to each other over great distances. Unfortunately, the first call she receives is from Pinkie.
Side story to "Not-So-Normal Adventures of King Sombra and Pinkie Pie". Sombra and Pinkie get into an argument and Sombra finds himself left out to dry afterwards. Having no one else to turn to, he ends up asking the last person he wanted t