new-nintendo-3ds-3dsxl-2ds-2dsxlnintendo-network-idnintendo-switch
I already have a Nintendo account created on a 3DS. When adding a new user on a Switch, I have a choice between logging into an existing account or creating a new one.
Will I be able to use the account I have created on a 3DS with a Switch? If yes, what will be carried over from 3DS to the Switch? Or is it just that I will have the same username and password on both systems, but apart from that the accounts will be separate?
Based on a few other links I've found, it appears to be the 3DS and not the account that gets banned.
Take this link for example. It contains the following screenshot:
According to that screenshot, which is from a 3DS, it states that "This device's access to online services has been restricted by Nintendo." The link also states that buying a new 3DS is the solution (worded towards heavy 3DS users, but none the less). Considering that information, it appears to be the 3DS itself.
I found a second link that states:
Players that go online with early, pirated copies of Pokémon Sun & Moon on the Nintendo 3DS are reporting that their systems have been completely banned from accessing Nintendo's servers, including the system's online eShop.
Once again, it mentions that the system is banned and not just the account. It also contains a similar screenshot of the one above.
From this Reddit, the way Nintendo performs the ban is by seeing which 3DS systems accessed the online services prior to the release of the actual game. If they detected that you played the game online before it was released, they would essentially blacklist your MAC address of your device. People who were banned could attempt to spoof their MAC but this is rather difficult and probably even more difficult to do on a 3DS.
No. If you transfer your user data all of your saves in any games will transfer over unless you do something wrong during the transfer.
Best Answer
According to this Nintendo Support article, you cannot directly use the account you set up with your 3DS. A 3DS system uses an account that is tied to a Nintendo Network ID, which functions differently than accounts tied to a Switch.
You can link your 3DS account to your Switch account, which this article provides information on how to do that. The benefit for linking your accounts provides the ability to share funds between your systems.