It sounds like you're looking for a compatibility report on using an Xbox controller (likely Xbox 360 or Xbox One) to play New Super Mario Bros. Wii — specifically a ROM/hack or emulated version titled "Dolphin New Super Mario Bros. Wii" (which refers to the Dolphin emulator running a fan-made New Super Mario Bros. Wii mod or the original game).
Benefits of Using the Dolphin Emulator
Once you have configured the Xbox controller settings, you can start playing New Super Mario Bros. Wii using the Dolphin emulator. Here are some tips to enhance your gaming experience: dolphin new super mario bros wii xbox controller
and can even perform partial tilts with the analog triggers. save these settings as a profile so you don't have to remap them next time? Introduction to Dolphin and New Super Mario Bros