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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, April 26th, 2020

New improved NATNEG speeds for MKWii
For Mario Kart Wii, the NATNEG (connecting process to other players) has been accelerated by a lot, so both friendrooms and worldwide races should now be more stable.

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

Sunday, November 11th, 2018

Required Wiimmfi Patcher update for Mario Kart Wii:
All Mario Kart Wii users have to update the game image to protect their hardware against cheat code that can brick it. → Details

Saturday, March 31th, 2018

Custom Regions managed by a robot:
A robot detect regions, that were not used sinces 2 years or never used 1 year after assignment. The owner of the region gets a system message as warning. 31 days after the warning message, the owner loses the control of the region, gets a second message and the region is disabled.

Sunday, March 18th, 2018

Custom Regions:
Until August 2017, users reservered custom regions by the Custom Track Wiiki. Until today, these regions were reserved at Wiimmfi too and Wiiki users had an chance for re-applying then regions. Now most of these regions are free for anyone.
Complete change log
NeoRame made this logos.