Pokemon SoulSilver Version

You become a Pokemon Trainer, travelling from town to town across the Johto region on an adventure to catch, train and battle Pokemon You can take your favourite Pokemon with you wherever you go using the new Pokewalker accessory; wireless transfer a Pokemon to the Pokewalker and walk your Pokemon through virtual routes as you walk around in real life. By walking, you earn Watts that can be used to encounter and catch wild Pokemon or search for hidden items; the Pokemon in the Pokewalker will gain experience points as you walk, and can even go up one level when Pokemon is transferred back into the game.