I am listing emulators which are open source because those emulators put more time and dedication fighting against nintendo.
These consoles are for playing stuff like:
The emulator to use is https://mgba.io/. It is a conctinuation of the Game Boy Advance Emulator a project that's been discontinued. mGBA not only supports gameboy advance games it also supports gameboy/gameboy color (allegedly).
This console is used for playing stuff like:
The emulator to use is http://desmume.org/.
This console is used for playing stuff like:
The emulator to use is http://citra-emu.org/.
This console is used for playing stuff like:
The emulator to use is http://yuzu-emu.org/ or https://ryujinx.org/. I have never used Yuzu but allegedly is more smooth than ryujinx. For me, ryujinx is constantly getting new updates and performance is only getting better.
The majority of these consoles aren't even sold anymore. Neither are these games. So… clicking some links to get some stuff. archive.org has freely accessable archives for a lot of games released on older consoles.
https://archive.org/download/nointro.gba
https://archive.org/download/nintendo-3ds-complete-collection Both 3DS and CIA roms must get decrypted.
Video Guide: https://invidio.xamh.de/watch?v=PKPria2BMIQ
Getting the switch emulators up and running is not as simple as Open rom, save rom. Make sure to read the documentation of yuzu or ryujinx. Or if your good at following directions of a thousand file manager tabs open on youtube that could work. Ryujinx Guide Yuzu Guide. Now in terms of link clickery, most nintendo switch roms are on 1fichier. Why are they on 1fichier? I do not know. But when using 1fichier directly it's sketchy (you can not use an adblocker) so someone made a downloader. However, they deleted it. Thanks to our good friend archive.org it's still up: 1fichier-dl. It's very self explanitory to use. Then in order to get 1fichier links I found this site. I believe both ryujinx and yuzu can handle either NSP or XCI files. Or you can risk it for the biscuit with torrenting. These days nintendo is catching link clickers left and right.