To coincide with its revamp, the Pokemon Global Link has announced a Porygon event for fans from the US and Australia.
First, a Porygon with the hidden ability Analytic is available for download using the password IGNPORYGON.
Secondly, a Porygon2 PokeDoll decoration is available for your Dream World house. Once you receive it, you can get it for free from your Dream Catalogue.
Finally, you can download a Porygon-Z C-Gear skin using the password PORYZCGEAR2012.
To claim these items, visit the Promotions page of the Global Link. They will be available until September 27th.
Source: Pokemon Global Link