Apparently the Nintendo Wii uses bluetooth for its wireless devices. A few clever users found a way to use this with Project64 through third-party drivers and software hacks. There is a video up on youtube about this, here's the video below.
The most important thing you'll need to get this working is a bluetooth dongle, you can find these on eBay rather cheap, and obviously a Nintendo Wiimote. I haven't tried this myself, if anyone has we'd be curiuos to here from others!

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