@frostclaws Yes, as it turns out. quite a few in fact. http://www.mayflash.com/Products/NINTENDOWiiU/W012.html
@frostclaws okay turns out that's the only one I can find lol, but apparently it works natively on pc, and that's an updated version of a much earlier one they did that just had two ports. This one also works on the Nintendo Switch and Wii U as it turns out as well as PC. nice!
@Nine @frostclaws the mayflash one is nice yes
you can also use the official nintendo gamecube controller adapter for the wii u or switch in dolphin
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@frostclaws @Nine not out of the box, there may be custom drivers or something
the mayflash adapter has a switch to change it between xinput and switch/wiiu mode though so you get the best of both worlds
also the official one is excessively expensive last we checked
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@frostclaws @Nine i feel like the mayflash adapter is probably easier and more versatile (especially if you later get a switch; you can then use the gamecube controller as a switch pro controller though it's missing the second Z button)
you can hook up wii remotes with plain old bluetooth too
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@frostclaws @Nine (incidentally, this is the one you'll want: https://www.ebay.com/itm/Mayflash-4-Port-Adapter-for-GameCube-Controller-to-WiiU-PC-Smash-Brothers/251790398554)
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@frostclaws @Nine though all of this is hypotheticals because you should probably wait a bit before buying any more stuff!
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@Felthry @Nine *grins* yeah, definitely. (: