Yup. You might not have to wait a week. If they ask I'd just tell them you bought a new system, did a transfer and you didn't realize the NNIDS would be stuck on one system because you want to keep them both separate.Ok so the process I mentioned is fine. Its just sorting out the NNID.
So I presume it will be better to just transfer it, wait a week, ask Nintendo to unlink the NNID, then login in with my NNID to the New 2DS
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