you def will need 4 WII-motes and 4 nunchuck controllers...

a couple of steering wheels are good. for mario kart.

you can't go wrong with any of the group games.. but they are all a little childish... so if you dont mind that get like mario party, super smash bro's.. wario game is nice (its a little off the cuff add )

wii fit is good enough but i think its 1 player :x


over-all you dont need that many accesories.