[SIZE=14pt]To get Oyajitchi you need 2 tamagotchis make sure both of them are the old people then let them mate. I found that on TamaLove.com try it. It should work. [/SIZE]
I way is to mate two old timers, and the offspring will be oyajitchi. It will go from baby to oyajitchi... so don't think something is wrong if it skips childhood and teenager years