Let’s clear up the myths and give you the technical truth. Unlike cartridges from the 90s, the Nintendo Switch operating system is complex. The emulator EmuDeck uses for Switch games— Ryujinx or Yuzu (RIP)—does not magically know how to decrypt or run a Switch game on its own.
You might have noticed that while your Super Nintendo ROMs worked instantly, your Switch games ( .nsp or .xci files) show a black screen or a "boot failed" error. This leads to the biggest question in the EmuDeck community: emudeck switch firmware
But for Switch? There is no shortcut. Emulation of modern hardware requires the original software. EmuDeck does not include Switch firmware for legal reasons, and no reputable guide will give you a download link. Let’s clear up the myths and give you the technical truth