. The only legally safe way to obtain a digital version of the game is to create a "backup" or "dump" from a physical retail disc that you already own. Stack Exchange Legal Methods for Getting the Game Dump Your Own Disc : Use a homebrew-enabled Wii console and a tool like to create a 1:1 copy of your physical disc. Wii U Virtual Console
Unlike its DS predecessor, the Wii version was built from the ground up with new levels and mechanics. Nintendo Wii Rom Download New Super Mario Bros Wii
How to Install Newer Super Mario Bros Wii : 6 Steps - Instructables Nintendo Wii Rom Download New Super Mario Bros Wii