My Little Pony: Friendship Is Magic2010

Twilight Sparkle:
Please, everypony, hang on while I try to figure something out! Come on, Spike. I've gotta try to remember the name of that legend she mentioned. [Spike looks in a bookshelf and pushes a button hidden in the back. A panel opens up, revealing a dusty book. He pulls it out with some effort and falls to the floor. Twilight picks the book up]

Twilight Sparkle:
Aha, here it is! "The legend of the Mirror Pond"... It describes a spell I can use to send them back where they came from!

Spike:
That's perfect! Let's go!

Twilight Sparkle:
But there's a catch. If I can't figure out which one's the real Pinkie, I might send her back by mistake!

Spike:
Well, we'll just have to figure out who the real one is then. Shouldn't be too hard.