Punch-Out!! (Wii) working as a WBFS file on your console, you need to ensure the ROM is properly converted and that your USB loader settings are configured to handle its specific dual-layer data or anti-piracy checks. 1. Correct File Conversion If you have an file, you must convert it to using a dedicated tool like Wii Backup Manager
Why WBFS matters for Punch-Out!!: A Punch-Out!! WBFS is usually between 300MB and 600MB. This saves massive space on your USB drive. More importantly, USB Loaders (like USB Loader GX or Configurable USB Loader) read WBFS files faster than ISOs, reducing stutter during cinematic punch animations. punchout wii rom wbfs work
If you are running the WBFS from an SD card, ensure you are using WiiFlow Lite Punch-Out