Instructions
Load "Pokemon HeartGold" or "Pokemon SoulSilver" to the main menu.
Select "Connect to PokeWalker." Wait for the device to connect.
Select the Treehouse as your route.
Walk 5,000 real-life steps with the PokeWalker in your hand or clipped to your belt.
Load your Pokemon game and connect to the Pokewalker to receive data. After walking 5,000 steps, you will receive either a Castform or a Kecleon. If you receive the Kecleon, you must wait until the next day to try again.