The safest and most legal method is to dump them directly from your own Wii U console using an FTP program . You can find them on your console at: storage_mlc/sys/title/0005001b/10056000/content/ Alternatively, some users use tools like NUS Downloader to fetch title 0005001B10056000 directly from Nintendo's servers. Pro Tip for Developers
: There are often multiple versions of the resource (e.g., fflreshigh.dat for high quality and others for middle or low quality). fflreshigh.dat
cannot legally include these files in their download. Since the data is copyrighted by Nintendo, providing it would lead to legal trouble. This means the file became a "rite of passage" for users: to make the game work, you have to "dump" (copy) it from your own physical Wii U console. 3. The "Missing File" Mystery The safest and most legal method is to