If you own the original disc, here are trusted sources where the community verifies releases:
New Super Mario Bros. U on Wii: The Definitive Rom and Compatibility Guide new super mario bros u wii roms for wii verified
Which of these would you like?
New Super Mario Bros. U is a popular side-scrolling platformer developed and published by Nintendo for the Wii U console. However, for those who own a Wii console, there is a desire to play this game through Wii ROMs. This report aims to provide an update on the availability and verification of New Super Mario Bros. U Wii ROMs for the Wii. If you own the original disc, here are