Can I do this if I have O3DS with ARM9LH on SysNAND running the latest Luma3DS 6.1.1 and firmware on version 11.0.0-33U?
Apparently this console is only banned from the eshop but I can still play online Error: 005-5964
ALSO: I have this other O3DS which is broken but it was never banned or anything, can I use THAT serial number entirely?
Yes. It should work just fine.