Piggy Robby Head Mystery Head Bundle Series 3

How big is the head?

My son wants the Dino piggy zombie that glows in the dark...this is not the same plush in this kit?

My son bought this for the dlc codes and lost one of them. is there any way for me to get the code without having to buy it all over again?

Is each piggy different? My son wants another box but I don’t want duplicates