The Nintendo Switch is not a powerful console by modern standards, but it is a beast for arcade emulation.
: pFBA is praised for its "outstanding quality" and comfortable navigation on handheld consoles like the Switch.
Within the NSP, the ROMs are packed into a folder like /pfba/roms/ . You generally cannot add or remove games from a pre-packaged NSP easily; you would need to unpack the NSP, modify the folder, and repack it using tools like NSC_Builder .