How does emulators/ROMs work?

[canito_q]

Hey, I want to play KH 358/2 Days as dast as possible so I have been downloading some emulators and ROMs, but I don't get how they work, the tutorials at youtube are really shitty, so please help.
Also, any recommended Emulator that works faster/better?

 

[Orion]

ROMs are the game files that are essentially ripped straight from the cartridge, minus anti-piracy stuff and whatnot.
Emulators are programs that mimic NDS's so as to play the NDS ROMs.

Most ROM's can just be directly opened with or drag-and-dropped over an emulator it can run, but sometimes you need to set up specific folders to store game and save files. I've frankly never been too successful at ROMs and emulators for the DS, but that's as much as I know.

 

[canito_q]

ROMs are the game files that are essentially ripped straight from the cartridge, minus anti-piracy stuff and whatnot.
Emulators are programs that mimic NDS's so as to play the NDS ROMs.

I'm not that much of a newbie xD

Most ROM's can just be directly opened with or drag-and-dropped over an emulator it can run, but sometimes you need to set up specific folders to store game and save files. I've frankly never been too successful at ROMs and emulators for the DS, but that's as much as I know.

Ok, thanks

EDIT: ......please more answers