Perso, je n'ai rien à redire concernant l'aide que j'ai trouvé ici.
Pour ceux que ça intéresse, le nom des émulateurs avec le .cfg correspondant.
Parfois c'est évident vu le nom, parfois non alors si ça peut aider quelqu'un :
amstradcpc.configfile=/recalbox/share/system/.config/retroarch/config/cap32_libretro.cfg
atari2600.configfile=/recalbox/share/system/.config/retroarch/config/stella_libretro.cfg
atari7800.configfile=/recalbox/share/system/.config/retroarch/config/prosystem_libretro.cfg
atarist.configfile=/recalbox/share/system/.config/retroarch/config/hatari_libretro.cfg
colecovision.configfile=/recalbox/share/system/.config/retroarch/config/bluemsx_libretro.cfg
fba_libretro.configfile=/recalbox/share/system/.config/retroarch/config/fba_libretro.cfg
gamegear.configfile=/recalbox/share/system/.config/retroarch/config/genesisplusgx_libretro.cfg
gb.configfile=/recalbox/share/system/.config/retroarch/config/gambatte_libretro.cfg
gba.configfile=/recalbox/share/system/.config/retroarch/config/mgba_libretro.cfg
gbc.configfile=/recalbox/share/system/.config/retroarch/config/gambatte_libretro.cfg
gw.configfile=/recalbox/share/system/.config/retroarch/config/gw_libretro.cfg
lynx.configfile=/recalbox/share/system/.config/retroarch/config/handy_libretro.cfg
mame.configfile=/recalbox/share/system/.config/retroarch/config/mame078_libretro.cfg
mastersystem.configfile=/recalbox/share/system/.config/retroarch/config/picodrive_libretro.cfg
megadrive.configfile=/recalbox/share/system/.config/retroarch/config/picodrive_libretro.cfg
msx.configfile=/recalbox/share/system/.config/retroarch/config/bluemsx_libretro.cfg
neogeo.configfile=/recalbox/share/system/.config/retroarch/config/fba_libretro.cfg
nes.configfile=/recalbox/share/system/.config/retroarch/config/fceunext_libretro.cfg
ngp.configfile=/recalbox/share/system/.config/retroarch/config/mednafen_ngp_libretro.cfg
ngpc.configfile=/recalbox/share/system/.config/retroarch/config/mednafen_ngp_libretro.cfg
o2em.configfile=/recalbox/share/system/.config/retroarch/config/o2em_libretro.cfg
pcengine.configfile=/recalbox/share/system/.config/retroarch/config/mednafen_supergrafx_libretro.cfg
pcenginecd.configfile=/recalbox/share/system/.config/retroarch/config/mednafen_supergrafx_libretro.cfg
prboom.configfile=/recalbox/share/system/.config/retroarch/config/prboom_libretro.cfg
psx.configfile=/recalbox/share/system/.config/retroarch/config/pcsx_rearmed_libretro.cfg
sega32x.configfile=/recalbox/share/system/.config/retroarch/config/picodrive_libretro.cfg
segacd.configfile=/recalbox/share/system/.config/retroarch/config/picodrive_libretro.cfg
sg1000.configfile=/recalbox/share/system/.config/retroarch/config/genesisplusgx_libretro.cfg
snes.configfile=/recalbox/share/system/.config/retroarch/config/snes9x_next_libretro.cfg
supergrafx.configfile=/recalbox/share/system/.config/retroarch/config/mednafen_supergrafx_libretro.cfg
vectrex.configfile=/recalbox/share/system/.config/retroarch/config/vecx_libretro.cfg
zxspectrum.configfile=/recalbox/share/system/.config/retroarch/config/fuse_libretro.cfg
