For detailed, step-by-step instructions on setting up your console to handle these files, the Wii U Hacks Guide is the most widely recognized community resource for modern homebrew.
In 2021, the easiest entry point was the Environment Loader using the Internet Browser Exploit . You would navigate to wiiuexploit.xyz , run the OSDriver exploit, and launch the Homebrew Launcher. wii u wup roms 2021