GH5 for Wii? You may have a tough time looking for it.

Depends on Wii Guitar also. I remember it supports all though. Any mic is ok, as long as its USB (preferably the one made for consoles or Logitech).

is probably the same as mine.
for those buying a 2 piece mic of this kind, the splitter given is not a usb splitter, but a karoake jack splitter. what this means is that although u bought a 2 piece mic, the game only recognize it as one mic. 2 people can still sing together, but system thinks u are singing in one mic only. so to me is like buying one mic. so, jangan terpedaya of these 100rm 2 piece mics. look at the splitter given to know if it is really 2 mics, and not 2 half mics.