Turn on your Nintendo Switch and boot into the Atmosphère environment.

Enable this feature to save compiled shaders to your storage drive. This dramatically reduces stuttering the next time you revisit an area in a game.

– Know if the game is USA, EUR, JPN, etc., for language/locale settings.

Emulation technology exists in a nuanced legal framework. The consensus among legal experts and developers is that emulation is entirely legal, provided you use your own software licenses. The Legal Standard: Sourcing Your ROMs

Downloading a ROM from a public website, torrent tracker, or Discord server. Even if you own the original game, downloading a ROM from a third-party source is copyright infringement. Nintendo treats this as direct piracy.

Compressed versions of NSP and XCI files, respectively.

You need game files in XCI or NSP format. As discussed, the legal method is to dump them from your own Switch. If you choose to download ROMs from the internet, know that you are engaging in piracy and taking a significant legal and security risk.

Select "Dump application" to create an XCI or NSP file of your game card.