As you were wondering, "What is Wiimmfi?"http://wiki.tockdom.com/wiki/Wiimmfi_Project
This is Wiimmfi's Wiki and Info.
This is a Youtube tutorial video, click the youtube icon on the player and check the description, You should find links for downloading and installing Wiimmfi, also there's a way to play any game without homebrewing.http://smashboards.com/threads/guide-connecting-to-brawl-pm-wifi-post-wfc-shutdown-occasional-server-issues-are-temporary.355374/
This is a Guide for Wiimmfi, on Step1 : Hackless method, YOU HAVE TO DELETE YOUR SAVE AND GRAB UNTOUCHED WiFi Save, else you'll have to homebrew and go to homebrew method.
(WARNING : You need a SD Card, with homebrew or not, it's very important.)
Hey, since i don't know if there's anyone here uses Wiimmfi for gaming, To whoever wants to talk about this Project or puts their Friend Codes for exchanging!@ALOIYD
(@) : SSBB = 0907-9435-1309