Ok, I need help!! I'm stuck on mario I'm not a big game player so I'm probably just missing something simple but I got through to world 8 and got to bowsers big castle at the end. I got to the princess and the credits ran. I turned off my ds and went bak onto the game and nothing changed! The stop outside the castle was red not blue meaning I hadnt done the level. Do you have to get all star coins and go through all cannons and stuff to do it?? Please help me!