Hey, I think I figured out an easier way to hunt for the 16 new villagers rather than via mystery islands. First, you replace all 10 of your villagers with this 'No villager' (empty plot) file. Then, boot up the game, go past the Isabelle announcement and save, and then make a backup of that save file on JKSV. After that, boot up the game, and when you get to the title screen, press A to proceed past the title, but don't go through the Isabelle annoucement this time. Press the home button and close the game, and then go to your Date & Settings and proceed by a day. Repeat this 9 times, and on the 9th time, go past the Isabelle announcement, and you should have 10 random villagers on your island. If there is approximately a 4% chance of getting any of the 16 new villagers amongst the 400+ villagers in the game, and you get 10 chances of it each time, it would amount to approximately a 34% chance that one of your 10 villagers would be one of the 16 new villagers each time, if I did the Maths right.