Pokemon's First Appearance: Pokemon Gold, Silver & Crystal

The only major difference between Porygon 2 and the first Porygon is that the former's stat base total is much higher than the latter's. (Porygon 2 is at 515.) Other than that a lot is still the same. Porygon 2 can learn an assortment of non-damaging and damaging moves, its speed, power and stamina is high and its also weak against Fighting attacks. (Oh yeah, Porygon 2 also looks like a duck instead of multiple pieces of blue and pink rock candy glued together.)