Retroarch does not work well on my system. From what I've seen, he uses the core with Mednafen. Actually, I'd like to make the VDMGR emulator run through the Launchbox because in addition to the qualities I've mentioned above, it's not bureaucratic to run. However, if you say that Launchbox can not run it because of a lack of command line, I must wait to have the patience to start configuring another emulator.
The emulator is somewhat unknown due to the platforms it emulates: NES, NeoGeo Pocket, Sega SG-1000 / Mark III, MCS BASIC-52, TD 4, GMC-4, Z80 computers and MSX.
However, for Neo Geo Pocket (another somewhat non-famous) is the best I've seen. To run it, just get the BIOS of Neo Geo Pocket and rename it to "ngcbios.rom" by pasting the BIOS directory inside the emulator.
Thanks for answering. I'll try to implement some code here to find a solution.