You enter it where you enter all your codes ( not book codes ) and then cards will be added to your penguin.
you have to get a club penguin card or book code to enter in and unlock cards and as you can see ...... Well Sensei has em' all!
If you have a membership card then you need to enter this code into the code box on the Timecard page. See related links.
If you have a Mash Up card code then you can enter this into the secret code box on the Moshi Monsters sign in page.
at valencia
To enter a card code in Madden 06 on the PS2, navigate to the main menu and select "Options." From there, choose "Unlockables," and then select "Enter Code." Input the desired card code using the controller, and confirm your entry to unlock the associated content.
If it is network pin code you can get that code and instruction how to enter it .,from Prounlocking.com
Oh, entering a 39 Clues card code is as easy as painting a happy little tree! Simply go to the 39 Clues website, log in to your account, and look for the option to enter a card code. Once you find it, just type in the code from your card, and voila! You'll unlock a world of adventure and discovery. Just remember, there are no mistakes, only happy accidents.
buy a card and enter code on fantage.com
5774
It does not have a code it can be obtained when you enter medusa plot book card codes.
If you have a secret code then you can enter this into the secret code box on the Moshi Monsters sign in page.
promotion code optional for credit card