How do the codes for the final Club Nintendo Platinum/Gold reward work?

I am a platinum member on Club Nintendo, and recently Nintendo released their Elite member rewards for the year: downloadable 3DS/Wii U games. I own a physical copy of Animal Crossing: New Leaf, and that's also one of the games available for download. My Club Nintendo account is linked to my NNID which is linked to my New 3DS.
My question is: If I choose AC:NL as my reward, can I download that digital copy of the game onto another, completely separate 3DS? Is the download linked to my Club Nintendo/NNID, or is it a download code that I can use on another unlinked device?
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Can you still redeem Club Nintendo codes?
The Club Nintendo program has ended. All unredeemed Club Nintendo download codes expired on 8/1/15, and cannot be replaced or exchanged.How do I redeem my platinum points?
After you've completed one of these missions, just head back to the Nintendo Switch Online app to collect your Platinum Points, which you can redeem for digital wallpapers, physical items from the My Nintendo Store, and new member-exclusive icon elements you can collect and put together to create a new user icon.How to Get My Nintendo Platinum Points QUICKLY! | Mikeinoid
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