Porygon is a Normal type Pokemon introduced in Generation I. It resembles a computer.
Unknown, however, it might eat Pokemon food.
Porygon has only appeared once in the anime in the banned episode, Electric Soldier Porygon!. This episode was banned due to a flashing strobe effect which caused more than 700 children in Japan to have seizures.
Porygon makes a cameo appearance twice in A Chansey Operation!
Porygon also makes a cameo appearance in The World of Pokemon!.