Some games require the official Nintendo Switch system firmware installed within the emulator directory to boot correctly.
Use the emulator’s "Manage Title Updates" function to install the latest patch NSP file. This fixes bugs and improves performance. Enhancing the Experience: Emulation Benefits monster hunter generations ultimate rom downloa link
Many websites trick you by offering Monster Hunter Generations (3DS) ROMs when you search for Ultimate . These are not the same game. The 3DS version is obsolete. Some games require the official Nintendo Switch system