Gosh, i really can't understand why people try to shove in A9LH before actually trying to understand his problem.
Have you tried another SD card injecting the same emunand?
Uhm, not yet.
Also, when you do de DB trick you need to open up mset (Sys Settings [Emunand in this case]) and go to data management. It will ask you to repair data, let it do it. It won't fix by itself.
You shouldn't have the database error on FBI anymore.
I see. I guess the reason it's not working for me is I do the repairing on SysNand. I'll try again in EmuNand.
If on 9.2 for the emunand part try the rxtools injection for emunand (as dirty as it may be, it worked way back then)
if not try to load HB and install cia using 3dsx of FBI.
I've tried both, and I find rxTools injection easier
I don't know if this may be an SD-speed issue since i have an old3dsXL mset 4.1 Sysnand Rxtools (10.3)Emunand 32GB UHC1 (Class10) and a small o3ds 9.2 Menuhax Sysnand, Rxtools (10.3) Emunand 8GB class 4/4gb Normal SD. Both work just fine with the reboot patches of SSB4 and MH4U. [I know i have to a9lh them as a homework, but have lacked the time and interest to thoroughly do it]
I feel the same towards a9lh lol. If all else really fails I'll go ahead and try out another microSD card. Thank you so much for all your help!
EDIT: Both nands are unlinked in the two 3ds's.
EDIT2: Also i know that a9lh is the superior option here, but doesn't seem related to his issue since using multiple CFW the problem persists.