MAYFLASH Gamecube Controller Adapter for Wii U, PC Windows and Switch/Switch 2, 4 Ports

I used to have the old mayflash adapter for PC in 2012 which only supported two controllers and SOME rumble compatibility, and didn't work for Smash. This one is much nicer in almost every aspect, including shape/size, build quality, and compatibility.I bought this with the intention of testing "Nintendont" (a home brew application that works on the Virtual Wii side of WiiU that can play NGC titles via USB/SD) as the software declares working with the Nintendo adapter for the most recent Smash title. This one has a switch that allows the change between WiiU and PC modes, which I assume means the old one needed hardware to work on the console, which it did not.I first tried this at a friends house with a copy of smash. Worked fine, no lag as we could tell, and no input errors/ghosting. Cord length is also well above average. Smash fans, rejoice. A cheaper and just as good option exists!Second, I tried it with the homebrew software "Nintendont", seeing if it worked on the virtual version. I nearly inserted my actual GameCube disc since I was excited by the clean results in smash, which would have been bad (no, GameCube discs will not work and may damage your WiiU. Please do NOT try that.) The menu immediately picked up the controller like it did in the original Wii. I booted up the ISO for Kirby Air Ride and was met with excellent results. No input lag or ghosting. Now for the real precision test, I used F-Zero GX, notorious for being very sensetive to stick input and is highly customizable for dead zones, sensitivity, range, etc. I mapped the stick to the fullest and smallest ranges/zones I could and they were pixel perfect as with the Wii disc reader, and the good old GameCube itself. I was convinced at that point at how well it works.Final testing was done with Dolphin for Windows. I was met with the same results using the same titles as it was on the WiiU. Finally, quality rumble support! I didn't have to map anything in the version I used as it already had a preset for a real GameCube pad. However, if your version doesn't pick up the pad on its own, make sure you map the triggers separately from the analog sliders to the click button when you press it all the way down. Otherwise games like Metroid Prime will have issues when locking and free aiming. To do this, go to the controller properties in devices and printers and look at the red icons lighting up to see what numbers they are.In the end, I have to hand it to the developers at Mayflash. Product quality is definitely increasing at excellent prices. 5/5, I really cannot knock it for anything.

Genuinely glad I bought this thing.The instructions for plugging everything in, while they might seem a bit jarring at first, isn't actually that far-fetched. Making sure the switch on the back is set to the appropriate mode for the device you're trying to connect it to AND that all controller ports are empty, smack the black USB dongle into the device, wait a few seconds, and then start plugging controllers in. The white USB is for rumble, which does work natively on Switch (no idea about Wii U, didn't bother booting up Sm4sh) but will require certain software to work on PC.Input works almost flawlessly for both PC and Switch. Playing GameCube games and even non-GC games on emulators work really well with this adapter (just make sure you set the right player to use the right port: Player 1 should use port 0, player 2 port 1 and so on), and using it to play games on Steam works wonderfully. It even works with standalone games that have native controller support, albeit the controls might be mapped unusually since who the heck programs for a GameCube controller to be used in games these days?? No input lag at all for PC shenanigans.The L and R buttons (triggers, if you will), Control Stick and C-stick all mapped pretty sketchily in emulator and Steam for me, but this is likely due to the controllers I used being old and well-played with. Your controllers may have no issues here at all!However...There IS a very slight amount of input lag when playing on Switch, but for casual play it's nothing you can't acclimate to. If you're buying this for competitive purposes, you might want to look into other options.It also functions with both the original wired GC controllers and the incredible Wavebird controllers, though for the latter you're probably going to want to set the adapter on something roughly the same size like a book or a few game cases, otherwise the receivers for those wireless controllers won't let it sit flat. I'm sure it works with other 3rd party GC controllers too.Other than that, absolutely worthwhile purchase to get some more use out of those old controllers you might have laying around. Just maybe don't try using it for games on a console that demand fast inputs and faster reactions (Smash, maybe Windjammers, mostly fighting games lol, etc.)No issues with ports not registering a controller, ports sending "ghost" inputs, or inputs holding (outside of old Wavebird connectivity being wonky and well, old). If you do experience these things, I highly recommend you return the faulty product and try to get a new one. This thing CAN work, and boy does it when it does.