Used FBI to install both the agb_firm (sysnand install to nand) and games (sysnand install to sd). Again, it only works for me in sysnand on a n3ds. I haven't seen a report from anyone with a n3ds running them in emunand.
My downgraded n3ds can play gba in sysnand after installing patch agb_firm in sysnand in nand. Haven't seen any successful reports of doing the same in emunand on a n3ds