The matchmaker comes when your tamagotchi is 6 or 7 years old. Mine came at 6 one time and 7 another time. Then after she comes she will bring another tamagotchi species, and not necessarily from your friends list and asks you if you want to love it or not. You, on the other hand can deny this and wait till your tamagotchi is older so it will evolve into the old generation of tamas