It's 15 years ago. You're playing the original R/B/Y. You venture deep into Unknown Cave. After the long journey down, battling countless numbers of high level wild Pokemon (because who thought of carrying around repels back then ?) you finally approach that platform. And you see HIM standing there.
You approach him and engage. The text states "A Wild Mewtwo Appeared!" You quickly go to your items and find your Master Ball. You click it...
TOO BAD!! YOUR BOX IS FULL TROLOLOLOL
It happened to me :(
Team Axis for Pokemon X and Y. Calling it now :p 01/08/2013