I created a page in the “fun” section that shows the different fonts that they use for the logo, the in-game dialogue text, and even the store cards. What’s neat is that you can find all of those fonts online. Some cost money to purchase, but some are totally free! Check out the Poptropica Fonts page and it will tell you all about them and where you can download/buy them if you want.
Do you know of any other fonts used in the game? Post a comment below and I’ll add them to the page.