This created a significant demand within the homebrew community for two things:
On the Nintendo Wii, a is a file archive format used to install content—such as Virtual Console games, WiiWare, or custom channels—directly onto the console's System Menu. Unlike standard ROMs that require an emulator app to run, a WAD file creates a dedicated "Channel" icon on your Wii home screen, allowing you to launch the game just like a retail title. Wii Virtual Console Super Mario Bros 3 WAD Installer PAL
The Wii Virtual Console was a digital museum, and Super Mario Bros. 3 was one of its most visited exhibits. While the official store is gone, the provides a lifeline for European gamers who want to experience this masterpiece in its original, emulated glory on original hardware. This created a significant demand within the homebrew
You will need a homebrew application to manage and install the .wad files from your SD card. How to Install Wiiware & Virtual console games on the Wii! 3 was one of its most visited exhibits