Nintendo made their own emulator for N64 on wii, running the games full speed, while fan made emulators that has been developed for many years then ported to wii, doesn't. I think Nintendo is wise enough to take care of it themselves (if it was discovered they broke someone's license it would be a scandal)
Specs: intel i5 3570k @ 3.4GHz;
16Gb RAM; Raedon HD 7900;
Win8 64-Bit
16Gb RAM; Raedon HD 7900;
Win8 64-Bit