Ensure your emulator has the latest Prod.keys and Firmware (matching the game's release version) installed in its system folder. Without these, the game will not appear in your library.
Since the file ends in .rar , it is a compressed folder. You will need software like or WinRAR to open it. Super Smash Bros Ultimate (NSP)(91 DLC).rar
In the emulator menu (usually under File > Install Files to NAND ), select all the .nsp files for the 91 DLC items and the Update file. This integrates them into the game's virtual storage. 3. Setting Up for Modded Hardware (Nintendo Switch) Ensure your emulator has the latest Prod