iHome 3" USB-C to Ethernet Adapter Compatibility Nintendo Switch, Wii, & Wii U | eBay
Y Team Controller Adapter for Gamecube, Compatible with Nintendo Switch, Super Smash Bros Switch Gamecube Adapter for WII U, PC, 4 Port ,Black, W046 - Walmart.com
Nintendo Switch Not Backwards Compatible with Physical Games
Is the Wii U Backwards Compatible? | Wii U Backwards Compatibility | How to Play Wii Games on Wii U - YouTube
Is Nintendo Switch Backwards Compatible? Can you play Wii, Wii U or 3DS games? - Daily Star
The Switch will have no backwards compatibility with Wii U discs or 3DS cartridges, no comment on mobile games : r/wiiu
Amazon.com: Y Team Controller Adapter for Gamecube, Compatible with Nintendo Switch, Super Smash Bros Switch Gamecube Adapter for WII U/PC with 4 Port : Video Games
Amazon.com: UGREEN Ethernet Adapter USB to 10 100 Mbps Network Adapter RJ45 Wired LAN Adapter for Laptop PC Compatible with Nintendo Switch Wii Wii U MacBook Chromebook Surface Windows macOS Linux (Black) :
Amazon.com: Nyko Retro Controller Hub Plus - Gamecube Controller Adapter for Nintendo Switch, Connect up to 4 Controllers with Turbo and Home Button, Compatible with Super Smash Bros : Everything Else
GameCube Controller Adapter 4 Port Compatible with Nintendo Switch Wii U & PC USB
Nintendo Switch Backwards Compatibility Explained
The Nintendo Switch isn't backwards compatible with physical Wii U and 3DS games