UPDATE: The adapter works with Nintendo Switch for Smash Bros Ultimate and as a replacement joy con for other games when no motion controls are needed.



Using the adapter in Wii U mode, plug the black usb male plug into your switch hub while using the switch in tv mode. You can now use your gamecube controllers as you would any other controller on the switch. Tested with Rocket League, Astro Bears Party, Fortnite and more. I'm hoping this holds up in December with Smash Bros Ultimate. This sounds too good to be true but could definitely save hundreds on joy cons.



Original Review:



Not many reviews talk about the PC aspect, so I'll discuss that first.



In PC mode, the controller is fully mappable as a normal joystick and supports rumble after quick installation of drivers by Mayflash's website. I have used this adapter with two versions of Project64 (with rumble support!!), SNES9x, and NEStopia: each program worked great with the controller. In Wii U mode, this works great with Dolphin, a GameCube/Wii emulator, once you follow the directions on the Dolphin website. Dolphin is preconfigured for rumble support and premapped input. Could not be happier with using this on my PC.



On the Wii U, as long as it is in Wii U mode, it works right out of the box for Smash Bros Wii U ONLY with first party wired and third party wired/wireless controllers. Have not tested this with a Wavebird GC controller yet, as I do not have one. No input lag whatsoever, was able to easily perfect pivot even though I am not a top tier competitive player.



This adapter has an amazing build, with hefty supports at each point where the cord ends. Third party controllers do not fit as snug as first party controllers into the ports, however this has caused no problems even when playing with 4 players on the PC. The switch from PC to Wii U mode is large and has the right amount of resistance so that it will not switch unintentionally but feels like it will last a long time.



All being said, if you plan to ever use this on the PC, then this is a much better option than the official adapter as you can take advantage of Dolphins Wii U mode support while having many more options than Nintendo's adapter when in PC mode. For the Wii U only this adapter is equal with Nintendo's, so pick whichever works best for you with price vs collector value.



EDIT: This does work with the Wavebird!!