you have enough of smash bros? but you want the patch for smash bros?
well, up to you if you want to patch an iso that you don't want to play.
https://gbatemp.net/threads/need-help-with-vwii-gc-adapter-for-project-m.498236
like I said, it was specifically created for CTGP and ProjectM, and therefore only CTGP or ProjectM have that support. if you want to patch your smash, use CTGP or ProjectM patchers.
there's a 3rd version which is said to work with random arbitrary wii games (untested, no compatibility list exists), and ...
here the sources. I don't know what to do with an IOS module file. hermes cIOS had a module loader, but I don't know how it works. don't expect me to do anything with these patch, I don't have the knowledge or time to do anything from it.
something important you might want to know :
it does not work with usbloaders