How to get Hatugatchi(Hatsugatchi), or the one with the leaf:Get a Blended Family.
Let the bonding for your Tamagotchi Family be at 0-30%.
Train them all to be Smart.
If the percentage their bonding became at 40 or higher, just let your Tamagotchi miss most of its training until its bonding is at 0-30%.
How to get Lovezukintchi(Lovuzukintchi):
Get a Blended Family.
Let the bonding for your Tamagotchi Family be at 0-30%.
Train them all to be Smart.
If the percentage their bonding became at 40 or higher, just let your Tamagotchi miss most of its training until its bonding is at 0-30%.
How to get Watatchi:
Get a Blended Family.
Let the bonding for your Tamagotchi Family be at 0-30%.
Train them all to be Cheerful.
If the percentage their bonding became at 40 or higher, just let your Tamagotchi miss most of its training until its bonding is at 0-30%.
How to get those three at the same time:
Get a Blended Family and have one male and two females.
Let the bonding for your Tamagotchi Family be at 0-30%.
Train them all to be Smart.
If the percentage their bonding became at 40 or higher, just let your Tamagotchi miss most of its training until its bonding is at 0-30%.
From doing that, your first two Tamagotchi should be a Hatugatchi and a Lovezkintchi.
And for Watatchi, well to get her as the third child of the family, I guess it's random, the third child of your family might become a Potetchi or a Watatchi(You can only get either of this two if the third child or the youngest of the family is a girl.)