*sigh* This is, yet, another case of "not reading the text of the card". Porygon's Conversion 1 says, "If the defending Pokemon has a weakness, you may change it to a type of your choice other than colorless". Well, if you read the bold, you can see why this strategy falls right out of the water. Rocket's Zapdos(and any other Zapdos for that matter) doesn't have a weakness to begin with. It almost common sense. How can something not have weakness and then be given one?