Pokemon HeartGold and SoulSilver owners, if you've been having a ball [pun!] leveling and training your Pokemon using the Pokewalker, the Yellow Forest route is now available for download via the Nintendo Wi Fi connection. Any regular internet connection will work, no need to stop by any GameStops or Toys R Us stores to nab this one.
The Yellow Forest Route is chock full of Pikachu - in fact, you'll only run into Pikachu while you're visiting it. Some of the Pikachu will even have special moves that it normally shouldn't be able to learn, such as Fly or Surf.
You'll be able to download the route until May 5th. For instructions on how to download and get the Yellow Forest Route onto your Pokewalker, follow the link below.
Receive the Yellow Forest Route [Pokemon HeartGold and SoulSilver]