Nintendo Account and Nintendo Network ID Link Service Ends Next March

The service that allows users to link the Switch's Nintendo Account with the 3DS and Wii U Nintendo Network ID will cease on March 2024.

Nintendo Account and Nintendo Network ID Link service will end in March - Game News 24

Nintendo To Shut Down Wii U & 3DS eShop Support In 2023

Nintendo announces the closure of the Nintendo 3DS and Wii U eShop: date and details - Meristation

Nintendo's Wii U and 3DS stores closing signal a loss of digital art : NPR

Tutorial: How to register a Nintendo Network ID on Nintendo 3DS, Nintendo Network ID, Support

All the Nintendo accounts you need for your Switch - Polygon

Wii U and 3DS Nintendo eShop sales to end on March 27, 2023 - Gematsu

How to link your Nintendo ID with your Nintendo Switch

Unable to link my NNID to any Nintendo Account. : r/3DS

Nintendo Switch Online: How to sign up for the paid multiplayer service - CNET

Nintendo discontinues Nintendo Network ID logins after reports of accounts being hacked - MSPoweruser

Nintendo confirms 3DS and Wii U eShop closure dates