These are used for Wii channels (like the Photo Channel or WiiWare games). You typically install these using a WAD Manager on a modded Wii.
But the colors were wrong. The sky wasn't a bright, inviting blue; it was a bruised, twilight purple. The grass was a sickly neon green. And the music... the music was playing backward. New Super Mario Bros Wii Wad File
Installing WADs to the Wii’s internal NAND can cause “System Memory Full” errors if you run out of blocks (NSMBW requires ~340 blocks). A better option is to use EmuNAND via a USB loader. These are used for Wii channels (like the