@Mozzelex

I did not know ... and im somehow not able to find where this option is located

Im replaying to this old topic, because its the first that comes up with google search and is not giving me the complete answer.... first you need to login over ssh to get the systemlist.xml then you have to make a list of the consoles that are listed and then you have to lookup the "short" names for the console.ignore=1 List.

Im a Nintendo and Gamegear Guy.... this should reduce my List to the needed ones. This is for version 8.1.1 of recalbox for Raspberry Pi3 i hope this will save you guys some time.

tic80.ignore=1
oricatmos.ignore=1
msx1.ignore=1
msx2.ignore=1
gx4000.ignore=1
apple2gs.ignore=1
apple2.ignore=1
atari2600.ignore=1
atari5200.ignore=1
atari7800.ignore=1
atari800.ignore=1
atarist.ignore=1
sg1000.ignore=1
colecovision.ignore=1
vectrex.ignore=1
sinclair.ignore=1