ok so apparently the the very bottom is an advertisement for the sale of the "deco-piece" which in simple terms is what they are calling the heart thing that you stick on the top of the tamagotchi. this advertises a special one wherein you can get new characters, games and items.
heres a rough outline, that i got from a korean tamagotchi community, that they translated from the japanese to korean, so i roughly translated it to english:
<communication has been given a "power up"!>
- "you can now send mail to each other!!" write letters to your friends and then...