Things You'll Need
Instructions
Readying DeSmuME for the Wii
Insert the SD card into your card reader and attach the reader to your computer.
Download the "DeSmuME Wii" emulator to your computer. (See Resources for link)
Extract the .zip file to the root of your SD card.
Open the SD card in Explorer (Windows) or Finder (OSX).
Place NDS game ROMs in the "ROMS" folder, located inside the "DS" folder.
Place NDS save data in the "SAVES" folder, also located inside the "DS" folder.
Playing the emulator on the Wii
Eject the SD card from your computer.
Insert the SD card into the Wii&'s SD slot.
Turn on the Wii.
Open the Homebrew Channel from the Home Menu.
Select the DeSmuME emulator, then your ROM.