In most jurisdictions, including the United States, it is legal to create a digital backup of a game that you physically own for personal use. However, downloading a copy of a game from the internet—even if you own the physical disc—technically constitutes copyright infringement under strict interpretations of the law.
Many files found on the Internet Archive are , which are compatible with emulators like Cemu or can be installed via the WUP Installer GX2 on a hacked Wii U. How to Locate Wii U Content on the Internet Archive wii u roms internet archive