Ok so
, essentially. It took me a very long time to track down the special edition ACNH switch and I got a lot done on the island I started on my original switch in the meantime. When I got my ACNH switch, I contacted local customer service and they told me they would not help me move my data.
Well I thought, that is that, and I worked really hard on my original switch. I completed my house (including dreamie villager pics), my museum, moved in all my dreamies and catalogued all ordereable furniture from a lovely user here. But I have yet to properly decorate my island. Essentially I now have perfect buildings on a clean slate and I got myself really wishing I had this perfect island on my gorgeous ACNH switch.
I saw another user here mention Nintendo America’s chat service being super helpful about transferring data, so I figured it was worth a shot. I messaged them, and it turns out all I had to do was change my account region and they could help me! I was overjoyed until... I started up animal crossing on my old switch again
Since the whole backstory thing is getting long and rambly you can skip to here lol
And what do you know? I can still play on my old island on my old switch as well, the transferal did not delete it.
I’m overjoyed now
I have my hard work regarding the buildings and villagers on two islands. I can start terraforming like mad on my original, while only moving my ideas to the ‘perfect ACNH switch’ copy if they turn out great. I can hand over any amazing diys I get on the original to my ‘perfect’ copy over local wifi. I can have my cake and eat it too.
As a perfectionist I could not be more pleased with this situation
Anyway thought I’d post this information for anyone else having double switch issues

Well I thought, that is that, and I worked really hard on my original switch. I completed my house (including dreamie villager pics), my museum, moved in all my dreamies and catalogued all ordereable furniture from a lovely user here. But I have yet to properly decorate my island. Essentially I now have perfect buildings on a clean slate and I got myself really wishing I had this perfect island on my gorgeous ACNH switch.
I saw another user here mention Nintendo America’s chat service being super helpful about transferring data, so I figured it was worth a shot. I messaged them, and it turns out all I had to do was change my account region and they could help me! I was overjoyed until... I started up animal crossing on my old switch again
Since the whole backstory thing is getting long and rambly you can skip to here lol
And what do you know? I can still play on my old island on my old switch as well, the transferal did not delete it.
I’m overjoyed now

As a perfectionist I could not be more pleased with this situation

Anyway thought I’d post this information for anyone else having double switch issues
I’m bringing this back up actually because it seems I was wrong about some information I shared before. Forgive me on this as I did not have access to my old console at the time so I just wrote what was logical to me.
Updated info on island backup post restoration
After restoring my island to my new switch, island backup actually became automatically enabled, even though I hadn’t before. Furthermore the restoration process did not disable island backup on my old switch. I found this a bit strange so I disabled island backup on my old switch and left it enabled on my new one. Not sure if they’ll ever restore my data again but eh it’s worth a shot?
I also contacted Nintendo a second time to see if they cared about me having duplicate island data. They really... did not care, they gave me information on what the restrictions of a secondary console are and that’s it. I don’t think there are any problems? Especially since my duplicate island is no longer in the cloud
More updated info
I can't connect locally between the two islands, while I could do that when I had non duplicate islands
So maybe this is the cheating protection
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