#Delete NNID from console
1 messages · Page 1 of 1 (latest)
you didn't had to do that at all
now you'll not be able to use same ID ever
In any case, you don't need to factory reset the 3DS. Just follow the appropriate guide on this page depending on your currently installed version of Nimbus (shown on the top screen when you open it):
https://wiki.pretendo.zip/unlink-pnid
Information on unlinking a Pretendo Network ID
If in doubt, just do method 2 (Nimbus older than 2.0.0) first.