@sockscap verify the hash of the game in WiiBackupManager, to make sure it's the wbfs file is not corrupt.
If it isn't, check what version is, if it's the PAL/ or NTSC etc.
Next, depending on what video cables you're using, for example using composite to run NTSC games (even if forced) on a PAL Wii might not work, also depends on the tv you have (if it's HD, then it's fine), and vice versa.
Now in your case, since you have a Japanese Wii and in the case of trying an NTSC-U Wii game, it should work. so if the wbfs file isn't corrupt, then the problem could be from the drive you're using to load the game, usb flash drives are known for compatibility issues, so we need more details regarding your setup.
If it isn't, check what version is, if it's the PAL/ or NTSC etc.
Next, depending on what video cables you're using, for example using composite to run NTSC games (even if forced) on a PAL Wii might not work, also depends on the tv you have (if it's HD, then it's fine), and vice versa.
Now in your case, since you have a Japanese Wii and in the case of trying an NTSC-U Wii game, it should work. so if the wbfs file isn't corrupt, then the problem could be from the drive you're using to load the game, usb flash drives are known for compatibility issues, so we need more details regarding your setup.











