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Wiimmfi Main Page


The Nintendo Wi-Fi Connection (WFC) service was an online gaming service that provided free online play in various Nintendo DS and Wii games. Nintendo discontinued the service on May 20th, 2014, primarily because the host of the service, GameSpy, was shutting down its servers. Nintendo WFC was required for online play, but the Wiimmfi Project has replicated much of its functionality and allows for continued online play in Mario Kart Wii and other games.

Wiimmfi is available for the public since May 10th, 2014 (10 days before WFC shutdown). It started with Mario Kart Wii and supports now more than 100 games. Read »Development of Wiimmfi« for details.

To use Wiimmfi, the games must be patched to use the new domains and also to change some other settings. See »Wiimmfi Patcher« for more details.


This part is used for announcements. Remember that Wiimmfi is a free service, so please be patient if we stop the servers temporarily to fix bugs or to update the system.

Wiimm & Leseratte

Sunday, January 5th, 2020

Donation page
After being asked multiple times during the last few months, Wiimm and Leseratte added a Wiimmfi donation page, which allows you to help pay for server costs if you'd like. This is completely voluntary, Wiimmfi is still free for everyone to use.

If you'd like to donate (Patreon or PayPal), please click here: Donate

Log of last updates

November 2019

Wiimmfi moved to a new server
In November 2019 Wiimmfi moved to a new server. If you are still using the old IP as DNS serrver, you'll need to change that to the new one (

October 2019

Dolphin now requires a real NAND backup
As of now, players who'd like to play with Dolphin do need a copy of an actual Wii / vWii NAND backup imported into Dolphin.

Sunday, November 11th, 2018

Required Wiimmfi Patcher update for Mario Kart Wii:
All Mario Kart Wii users have to update the game image to fix some security issues in Mario Kart Wii. → Details
Complete change log
NeoRame made this logos.