That's too bad. Where was the last place you saw it? Keep looking around. If you still can't find it you can look in Wal Mart and Toys R Us and Target to buy a new one because these stores sell them.
I think of a place you would least except it in. When the last recieves do the impossible. Like looking in a refirgerator or your outfit you wore yesterday. Maybe someone has it.
Go to Target, Wal-Mart, or the mall. Or the internet.
Where is the last time you went with it? If you want to order one online, I consider going on amazon.com and buying one. eBay is too dangerous. There are too many fake tamagotchis there
I would try this if i were you. Before i buy a new tama i would try to remember last place i put it and once you remeber go there and wait for alittle while you should hear it beep sooner or later. Also i think my favorite place to get a tama is at the mall. Try K-bee toys or ToysRus or even walmart or target. Tamagotchi's aren't usually hard to find. But i do think it is much easier to get one at a toy store where you will know they always sell them.