It's been a long time Elice, but I think you should read this:
http://www.serebiiforums.com/showthread.php?540127-Do-you-think-Mewtwo-could-appear-in-BW/page11&highlight=haunter227+mewtwo
Then laugh at everybody who said it wouldn't happen.
http://www.serebiiforums.com/showthread.php?540127-Do-you-think-Mewtwo-could-appear-in-BW/page11&highlight=haunter227+mewtwo
Then laugh at everybody who said it wouldn't happen.