How to Unlock World Crown
World Crown is unlocked by collect all of the Green Stars throughout the game, as well as all of the Stamps. In addition to this, you must also get the golden flag on all of the courses that have them. You can press the Minus (-) button to bring up the map, then press R to go to the results screen, which should tell you if you’re missing anything. Once you have collected everything, go to World Flower and the rocket on the right side should be there to carry you to World Crown.
World Crown is the final of the bonus worlds, making it the final world of the game. It is also the most challenging, despite only consisting of three levels. You have one normal level, one Captain Toad course, and a Mystery House. Champion’s Road, the normal course, is the most difficult level in the game, while the Mystery House has you facing a total of 30 challenges before you’re complete. Be prepared to spend a lot of time on these two courses alone, as well as a lot of lives. Note that all three courses will have Stamps, which is the first time a non-normal level will have a Stamp.