Use a computer application like Wii Backup Manager to convert the ISO file into the .wbfs format. Method 2: Using Wii Backup Manager
You do not necessarily need a physical Wii console to enjoy Wii Fit in WBFS format. The popular PC emulator, , fully supports .wbfs files natively. wii fit wbfs
Plug your FAT32-formatted USB drive containing the correctly structured wbfs folder into (the port closest to the outer edge/bottom of the Wii). Launch your preferred USB Loader from the Homebrew Channel. Use a computer application like Wii Backup Manager