Pokéholics are encouraged to take their adventurous spirit away from the DS and into the great outdoors with the release of HeartGold and SoulSilver. Each version is bundled with a Pokéwalker accessory, which tracks your steps on an LCD display. Every step you take earns you Watts, a type of energy used to capture wild Pokémon or to locate hidden items from within the Pokéwalker.