Could I unlink from a 3ds?Unless you have a ton of games and other items, what I ended up doing was just include the NNID in the sale. Just gave them the login info and let them change the e-mail so they could keep the content. Though if you have other consoles attached to the NNID, this may not be feasible.
Could I unlink from a 3ds?
Man nintendo is so complicated!Not on your own. Nintendo might be willing to do something.
A format deactivates the licenses, but keeps them tied to the same console.
NNIDs are limited to one 3DS family system, and one Wii U. They cannot sign into any other system without some kind of transfer.