Astro Knights Island is one of the hardest islands in Poptropica. Along with Steamworks and Skullduggery. In Astro Knights,you need to go to different different planets and win many boss battles. In Steamworks,you have to fix the gears. What is hard about that? I'am not sure,cause i haven't even made it halfway yet. In Skullduggery you have to get million doubloons to buy the Pheonix Warbird and defeat Captain Crawfish. One million!!!!!!