Yes,you must use the Pokewalker when you're not playing both games.
Any time you want.
You have to catch him in SoulSilver and trade it, or use your PokeWalker
no
on the pokewalker
To get the Pokewalker, you have to buy the game that goes with it (because otherwise, the Pokewalker is useless), which is either Pokemon HeartGold or SoulSilver.
use your pokewalker from Sinnoh Sound or trade from D/P/Pt
The pokewalker, yes but not the figure.......
Yes you can if you have Mew in your Pokemon SoulSilver/HeartGold You can put Mew in the Pokewalker.
go to your heartgold or soulsilver main menu and you'll see connect to pokewalker. you can retrieve it from there by pointing your pokewalker at your ds.
You can just find someone else with a pokewalker
you can buy a pokewalker by buying the game Pokemon heartgold and soulsilver game pack.
Once you have a Pokemon on your PC. Please see the related link below.