If it has died and it is on a V3 - press A+C together and hatch a new egg. The details of your tama will be stored in History after that as long as you do not press the reset button.
I just feel so sad that she died after so long she was fed and happy, although even though I played lots of games I could never get her training bars up
u get discipline-points for time out when ur tama beeps when not needing and doing anything or givin a bad present or praise it when it cries or turns ots back on u
The reason your tama died was nothing to do with it's health.
The simple reason was that you refused the matchmaker until your tama evolved into an oldie which was either ojitchi (male) or otokitchi (female). Then your tama grew older and older until it finally passed away. The only way to prevent an oldie from dying, is to mate it with another oldie of the oppisite gender.