I already did this method and it does work.
--------------------- MERGED ---------------------------
Figure, I'll post it here too.
No I bypassed the 001/002 ban by injecting a public LFCS, then used a dummy nnidsave.bin to delete the NNID account. After that the system transfer worked just fine. It transferred everything to the other 3DS, including the banned LFCS/moveable.sed. Yes, the 3DS I transferred to was banned. Mine got a new generated set of certs, and now everything works just fine. I made a new NNID, can access eShop normal and can go online, even got a new Friend Code. The other DS that was banned was "unbanned" when I restored the backup of it's original sysnand that I made before the transfer so it restored all of the 3DS' unbanned files as well.
Essentially, I sent the ban into limbo instead of sticking it on another 3DS. After verifying the 3DS I transferred to was not banned anymore I returned it to the store for a refund. Again, I did not return a banned system. PLEASE DO NOT RETURN BANNED SYSTEMS. If you can't unban the new one, just keep it!!
— Posts automatically merged - Please don't double post! —
I think they ban the device ID which is generated again in a system transfer (I mean, it HAD to be otherwise the ban wouldn't have transferred anyway) So the new 3DS got the Device ID of my old one, and my old one got a new one. That's the only thing that can explain why it works.