You have to download it from nintendo wi-fi like yellow forest, but I still don't know how to get wonder cards for legendarys will some one tell me a date to get it or where to get it
How Do I Get A Wonder Card In Pokemon Heart Gold?
You need yo get a special event like yellow forest for the pokewalker via wifi "wfc" then go to Pokemart you know when you get a call from your mother some guy in red will deliver the items the wonder cards are delivered by someone in green