If you just want the best working version for Wii today:
When users hunt for a "patched" RetroArch Wii build today, they are usually looking for one of three specific modifications that have extended the console's lifespan well beyond Nintendo's support: retroarch wii patched
: Locate your desired patched version (common sources include specialized threads on the Libretro Forums or GitHub repositories like RetroArchWiiRetrode SD Card Structure folder into the folder on your SD card. folder within the root directory to organize your game files. Install BIOS Files If you just want the best working version