It's the same thing for all versions . When you have all the requirements in order to have your tamagotchi's marry (boy - girl of course) both use a love potion. Connect your tamagotchis within 10 minutes, or else the Love Potion will fade away. Then the female tamagotchi (girl) will lay a baby. The gender is random . Then you have a new generation, and you can now access the Parents building on V3 TamaTown, or V4 TamaTown . The next generation will be your grandparents . Good Luck on your tamagotchi's marrige .