Hanbunkotchi:0-2 Care mistakes and 20 above happiness!
Mokofurtchi:3-5 care mistakes and happiness above 20 points!
Penribotchi: 6-More care mistakes and happiness above 20 points!
This is for help for others. more coming soon!
Let Me Know if this helps in the comments!
It Could be the battery or your volume. Try checking your volume or change the battery. some times the battery can be dead before the notification.
Note:Not my image.