Nintendo announced the closure of online services for the Nintendo 3DS and Wii U platforms in early April 2024. As a result, online gaming on these platforms will no longer be possible.
In March 2023, Nintendo had just shut down the eShop for 3DS and Wii U, and temporarily closed the online system for the Wii U for 5 months to conduct repairs. It was only in August of this year that they finally reopened the online services.
The Nintendo 3DS was initially released in 2011, while the Wii U made its debut in 2012. Considering the current age of these consoles, it’s been over 10 years since their release.
TLDR: Nintendo has announced the discontinuation of online services for the Nintendo 3DS and Wii U, rendering online gaming impossible on these platforms. The closure comes after temporary shutdowns and repairs, with the consoles now having been on the market for over a decade.