How to use 8bitdo USB Adapter with WiiU Pro Controller - YouTube
The SNES Classic & Wii Classic Pro controllers both work on Mario Maker 2 using the 8BitDo Gbros Adapter, both have ideal dpads and feel right at home : r/NintendoSwitch
Play Wii with FC30 GamePad - YouTube
8BitDo Pro 2 Bluetooth gamepad|サイバーガジェット
Gbros
8Bitdo Wireless PS3/4 Wii Mote Wii U Pro Controller Bluetooth Adapter for Nintendo Switch, Windows, Mac & Raspberry Pi - Newegg.com
Amazon.co.jp: 8Bitdo GBros Wireless Adapter for NES SNES SF-C Classic Edition Wii Classic for Nintendo Switch [SRPJ2126] : Video Games