You dont seem to understand...Like I just explained the Wii is regoin locked no matter what you do it will not work in another region! That's why they call it a regoin lock! the games are alos locked to the same regoin console however its no good if the console doesnt work!!
And it is true that you have voided your warranty by importing it. as far as nintendo is concerned it was your fault and not theirs. You have voided your warranty automatically voids