I play club penguin and it is okay. But I like Poptropica better.     I hope this helped!

You can figure out by going to the pet shop. Click the pet shop house with the note on it. THen use your code to figure out! Done!    Hope it helped! 

You can sell your puffle on club penguin if you don't take care of him for a long time. That also includes no walking with your puffle that you want to sell.