A poor nearly defenseless caterpillar appears in Ponyville, no pony knows what it is, so Twilight tries to find out, and somehow, hundreds of new creatures appear, and war breaks out. What will become of the beloved town of cartoon ponies? Why should you care about that? What about the caterpie?!

Human tag not because Twilight and friends are, but because the trainer is.

Additional note: Please, if you don't like pokemon, don't be like 'oh its a pokefic' and click dislike because of that, it really doesn't help anyone if you do that, I'm not saying you can't, just that I would appreciate it if you didn't.