This is for one new, sealed in box Digimon Digital Monster. It is made by the same people who made Tamagotchis, so you get to care for your Digimon and raise it up from an egg, train it, and then battle with it. You can connect them to other people's Digimon devices and battle against others. Very cool, and you can get a different Digimon every time you play (it looks like there at lease 8 Digimon available).

Thanks for looking!