The gamecube controller adapter is your best choice to play Super Smash Bros on nintendo switch, wii u. Very easy to use, just switch the button "Wii u/PC" located on the side and no driver need, no lag and interference with the built-in Vibration Feedback.
Updated Version.The newest chip design. Japanese expert R&D. Beyond most gamecube controller adapter. So please just rest assure for the product quality.
Plug and Play - Built in newest IC chip, Just plug and then play your games. No lag and no drive install need. Change the adapter button on WII U to play on WII U and Switch mode, Change the adapter button on PC to play on PC mode.