Twilight Sparkle is The newest Princess of Equestria, when she was young her best friend was a Unicorn named Thunder Quill. They were inseparable, but when he had to move away, she swore off friends forever. Now he's back, but he holds a secret.
What did he ever do to deserve this? He didn't think that someone was going to hit him with some random spell that turned him into, well, this! And now the TARDIS isn't cooperating. maybe somepony will believe