you have to beat the world 5 castle. Iggy will throw green fire at you while you are doing the course. World 6 is in the mountains.
You have to beat world 6
beat world 6
You have to get all the star coins in 6-6.
10. Paper Mario 9. Super Mario Sunshine 8. New Super Mario Bros. Wii 7. Mario Galaxy 2 6. Super Mario RPG 5. Super Mario World 4. Mario Galaxy 3. Super Mario Bros. 3 2. Super Mario 64 1. Original Super Mario Bros.
World 1-3 and 6-3.
Complete level 6 sfeb5h6bgtegbu
10. Paper Mario 9. Super Mario Sunshine 8. New Super Mario Bros. Wii 7. Mario Galaxy 2 6. Super Mario RPG 5. Super Mario World 4. Mario Galaxy 3. Super Mario Bros. 3 2. Super Mario 64 1. Original Super Mario Bros.
World 7 is unlocked when you complete World 6 and so on.
there is a secret passage in the second part of the world 7 fortress.
10. Paper Mario 9. Super Mario Sunshine 8. New Super Mario Bros. Wii 7. Mario Galaxy 2 6. Super Mario RPG 5. Super Mario World 4. Mario Galaxy 3. Super Mario Bros. 3 2. Super Mario 64 1. Original Super Mario Bros.
10. Paper Mario 9. Super Mario Sunshine 8. New Super Mario Bros. Wii 7. Mario Galaxy 2 6. Super Mario RPG 5. Super Mario World 4. Mario Galaxy 3. Super Mario Bros. 3 2. Super Mario 64 1. Original Super Mario Bros.
their is one in level 1-3 one somwhere in world 4 and 5 and 6