/vr/ - Retro Games

>>700264
Emulators are programs that mimick the functions of other hardware, in this case, of game consoles. I'm not sure what you mean by "how does it exist", but you can play video games from consoles or handhelds in your PC through them.

>>700274
The best GBA emulator is VBA-M. You can download it at http://vba-m.com/

The emulator is like the console or handheld. You also need games. Cartridges are called roms, while disks are usually isos or bins. You can download all of these on sites like http://emuparadise.me..

Feel free to ask if you have any other questions.