I remember seeing a website on one of the pokemon boards which instructed you to type in your ID no. and it would tell you what words to say to either the guy in the TV building in DPPt or the guy in the Violet City pokecenter.
The key words were different for every ID no. and they would unlock more wallpapers for your PC and in HG/SS you can get 3 pokemon eggs.
Does anyone know the website I am talking about? --- Platinum FC: 4254-4317-5960 (Thomas)