I'm not an expert, but one of my friends has NFC cards with the code/data (sorry again, not an expert, I'm probably speaking nonsense and the word is another one), and she was able to choose her dreamies that way
I knew people did this with normal amiibos, usually collectors that don't want to take their amiibos from their boxes but still use them. Like they would transfer the information to the cards.
The legality/ if it's against or not nintendo TOS, that's another thing I don't know anything about. I also don't want to get too off topic from OP's Raymond curse/ blessing