Once complete, exit to the Wii Menu. You will see a new channel icon for New Super Mario Bros. Wii . Launch it just like any other game.
The popularity of the search term is also driven by the emulation scene. Emulators like Dolphin allow users to play Wii games on PC. While Dolphin primarily runs .iso files (disc images) and .wbfs files (scrubbed Wii backups), it also has the capability to open and install WAD files. New Super Mario Bros Wii Wad File
A properly constructed NSMBW WAD contains the following components: Once complete, exit to the Wii Menu