Cemu makes installing updates straightforward through its built-in installer: [Cemu] Tutorial Install Updates & DLC Like a Pro
To play New Super Mario Bros. Wii U on Cemu, you'll first need to obtain the game. This can be done through various means, but we encourage users to only download games they own or have purchased. The game file for New Super Mario Bros. Wii U on Cemu is quite large, so ensure you have enough disk space. New Super Mario Bros Wii U Cemu UPD Download
No. The Switch version uses a different encryption. However, Cemu saves work with most online save editors. New Super Mario Bros Wii U Cemu UPD Download
There are two popular formats for Cemu: (unpacked folders) and WUA (compressed single file). We cover the standard Loadiine method. New Super Mario Bros Wii U Cemu UPD Download