Nintendo eShop will be taken offline temporarily for Wii U and 3DS - GameSpot

Services will be offline today from 4PM - 4AM ET for maintenance.

Wii Shop Channel - Wikipedia

Super Mario 3D World + Bowser's Fury - US Version : Nintendo of America: Everything Else

Super Smash Bros. Ultimate - SmashWiki, the Super Smash Bros. wiki

Nintendo Switch - Wikipedia

is now available for the Nintendo 3DS

Nintendo 3DS, Ultimate Pop Culture Wiki

3DS And Wii U eShops Are Shutting Down Today : r/Games

Nintendo Will Close Online Gaming For Wii U And 3DS In 2024 - Gameranx

WARNING: 1 Week Until Wii U & 3DS eShops Die! Here's 10 Games You Should Buy Before They Disappear!

Nintendo eShop closing for 3DS, Wii U next year — Here's something you might want to do right now