Can somebody help me, which name must i use in the playlist for retroarch, that i get the right logo ?
I don’t think NAOMI has its own database/icon currently. I’m not 100% on that, but I didn’t see anything for it in the database or assets repos.
Same as with every other arcade system, the RA scanner is not working (or at least only to a small degree)
I suggest to using a tool like RetroArch Playlist Buddy
For the playlist you can add your naomi games to an existing playlist (e.g. mame or dreamcast) or you are making your own icons for a custom playlist.
You will need a
*your_playlist_name*.png and a
*your_playlist_name*-content.png placed in