Our Cosmic Cannon Cluster stars guide details every Green Star in World Star-9 in our Super Mario 3D World stars walkthrough.
World Star-9 contains three Green Stars and a single Stamp to collect.
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Hop to the collectible you need:
Green Star 1
Cannon Block required! After making it up the wall full of cannons, run to your right and use your Cannon Block to break through the cracks in the wall to reveal the first Green Star!
Green Star 2
Cannon Block required! In the underwater section, use your Cannon Block to blast through some brick blocks that are blocking access to a hidden area with the second Green Star.
Green Star 3
Cannon Block required! In the final area, hit the red switch to change lanes. This will lead you to the Green Star, however, the path has a drop off. Use the Cannon Block to hit the Green Star.
Stamp Location
Cannon Block required! This Stamp can be seen early on in the level. Use the Cannon Block to hit the Question Blocks in front of the Stamp. This will form a path right to the Stamp.
What’s Next?
Check out our World Star-Toad: Captain Toad Takes a Spin guide or our Mushroom-1: Night Falls on Really Rolling Hills guide for green star and stamp locations for the next level.
If you’re looking for a different page, head over to our other guides in our Super Mario 3D World walkthrough!
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| Green Stars | Stamps | Cat Shines |
