It's a PokeWalker: https://cdn.bulbagarden.net/media/upload/thumb/8/8b/Pokewalker.png/250px-Pokewalker.png
It came with the games HeartGold and SoulSilver in 2010. It's a pedometer and you can load up your pokemon by using the sensor and your game/ds. The amount of steps you take, you can level...
Hello everyone! I'm mudpuppy and I am 19 years old.
I've bee a lover of Tamas and virtual pets ever since I was young. :)
I just started getting back into Tamagotchis and want to start a collection!
I love looking at other peoples collections c: