If you have a legitimate copy of the firmware 21.0.0 update (e.g., downloaded via NUT or extracted from a game cartridge containing the update):


If you're using Ryujinx and looking for information on prod keys version 21, make sure to follow safe and legal practices. Always refer to the official Ryujinx documentation and community guidelines for the most accurate and secure methods of obtaining and using prod keys.


Let’s be unambiguous: Emulation is legal. Downloading prod keys from third-party websites is a legal gray zone. To stay safe:

Also, remember that prod keys do not contain any personal information from your console. Dumping them from your own Switch does not risk a ban from Nintendo’s online services, provided you are careful with emuNAND.

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