There is a rumor that you can get a Nazotchi by not feeding your tamagotchi any snacks. No one knows if it is true because no one has ever gotten a Nazotchi before.
Now people are saying that Nazotchi is a non-playable character which means that you will never be able to obtain that character on your tamagotchi. The only time you will see it is if you connect with other characters your tama version doesn't recognize.
But, experiment! You never know what character you can get. Who knows? You may be the first one to get a Nazotchi!
GotchiGirl96