The game director of Tekken 6, Katsuhiro Harada, has said that if Wii owners want Tekken on the Wii, just ask, and they will bring it over! Here's the transcript:
: Do you have any desire to port Tekken 5: Dark Resurrection or Tekken 6 to the Wii at some point? Why or why not?
: That would be very interesting. Like the Xbox 360 owners, if Wii owners are passionate and make it known they really want the series on their system, we would love to be able to answer that request.
Hearing about the huge number of Xbox 360 owners who are Tekken fans, especially in North America, definitely played a huge part in influencing us to bring the game to that system.
As for the Wii, the standard controller lacks the right number of buttons and the placement is awkward, so... I suppose the classic controller could handle it!
So what are you waiting for? Make some noise around popular forums, post directly on Namco's forums forums.namcobandaigames.com/ or if you can snoop out the director's email address, send him one to let him know your Tekken love