If the fixes above don't work, here are some final checks:
If the game launches to a black screen, your Wii may lack the necessary cIOS to handle the game's data. mario party 8 wii ntscwbfs fix
Base 56 , Version d2x-v10-beta52 (or beta53-alt for dual USB port support) Slot 250: Base 57 , Version d2x-v10-beta52 If the fixes above don't work, here are
If the file size is larger than 4GB and your drive is formatted to FAT32, Wii Backup Manager will automatically split the file into RM8E01.wbfs and RM8E01.wbf1 . Ensure both files reside in the same folder. Fix 3: Update Your Wii's cIOS If the fixes above don't work