I claimed the Porygon a while ago. First you need to claim it from the promotions page,at
http://en.pokemon-gl.com/campaign/, you need the password of course. Then check if he shows up on the Friends Board in your house. You should be able to pick him up
from the dude in the Entralink Forest. No wait, you only pick up items from that guy, you need to go deeper into the forest, and Porygon will be there.