Secret Codes Littlest Pet Shop What Is The Secret Code For That Came With My Little Sister's Littlest Pet Shop Plush?

What is the secret code for that came with my little sister's littlest pet shop plush? - secret codes littlest pet shop

I tried entering lpso.com but I was a 12-digit code and lpso 16-digit code requires ..... NEED HELP !!!!!!!!!!!!