I have tried running the last stable release as well as many nightly builds of Retroarch Wiimednafen Fast core on a N3ds, I have the system card 3 bios in the right place and the games load and play fine. Awesome.
But when I tap the bottom screen and enter close content in the retroarch menu it...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.