Amazon.com: Mayflash GameCube Controller Adapter for Wii U, PC USB and Switch, 4 Port : Video Games
Amazon.com: MAYFLASH Magic NS 2 Wireless Bluetooth USB Adapter for Switch/Switch OLED, Windows, Raspberry Pi, Compatible with Xbox Series X & S Controller, Xbox One Bluetooth Controller, PS5 Controller and More :
Mayflash Gamecube controller adapter | Next Generation Emulation
Switch GameCube Controller Adapter MayFlash
I had no idea this worked! Using a Mayflash adapter on my Android phone! : r/emulation
New Mayflash 4 Ports For Gamecube Controllers Adapter For Wii U System & Pc Usb For Switch Firmware V05 For Windows/linux - Accessories - AliExpress
Mayflash SNES/SFC Controller to PC USB Converter Adapter - Walmart.com