The adults in P's will "die" (Tamagotchis in the P's don't die, they leave) if you leave them starving and unhappy which might take several hours, about eight at least, to a day. They'll get sick and eventually will leave you with a letter saying that they moved out due to lack of care. Such a weird question though. Why would you want your Tamagotchi to die when they can get married and reproduce? LOL. Anyway, I hope I helped.