Forum:Mewtwo in Brawl?

I know Mewtwo is a scrapped character in Brawl but there is another page on the brawl characters page known as User:KH and it shows Mewtwo and moves mentioned, Is this a joke or is it true and if it is how do I hack SSBB or someway to play as Mewtwo and possibly as other scrapped characters?

I have the PAL version if it that matters.