As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Porygon:
Did you know? State-of-the-art technology was used to create Porygon. It was the first artificial Pokémon to be created via computer programming. In recent years, this species has been very helpful in cyberspace. These Pokémon will go around checking to make sure no suspicious data exists.
Source: The Pokémon Company