To run the game, you need an emulator that mimics the original hardware:
Enhance the contrast and color saturation using custom post-processing shaders like ReShade or internal Cemu color profiles to make the landscapes pop. Local Multiplayer on a Single PC new super mario bros u pc
You can get unlimited lives in the Deluxe version by using a Baby Yoshi to repeatedly bounce on a Koopa shell in the first level of Acorn Plains. To run the game, you need an emulator
Cemu is the premier Wii U emulator for PC. It has matured into an incredibly stable piece of software, allowing the original New Super Mario Bros. U to run flawlessly. It has matured into an incredibly stable piece
This is the most important section. Emulators themselves are legal. They are pieces of software designed to interpret game code. However, the source of the game files (ROMs) is where the legal lines are drawn. In most jurisdictions, including the US and EU, downloading a copyrighted game ROM from the internet is illegal, regardless of whether you own a physical copy. The only strictly legal method is to dump your own game files directly from a Wii U or Nintendo Switch disc/cartridge that you personally own. This process often requires specific, legal homebrew tools to extract the data from your console.