Smash CANNOT be mashed. Seriously, I've tried. It just doesn't work.
As for Tekken, Katsuhiro Harada is just an attention whore (seriously, I've seen so many news stories about Tekken 6 over the past few days. It's not even gonna be out for at least 6 months. I guess T6's dominance in Japanese arcades has given them a large ad expenditure). This is simply his way of putting Tekken 6 in the news. Whether or not it'll come to the Wii...I don't know. But I assure you that his mind has probably already been made up.