Our Gargantuan Grotto stars guide details every Green Star in World Star-7 in our Super Mario 3D World stars walkthrough.
World Star-7 contains three Green Stars and a single Stamp to collect. If you’re looking for other Green Stars or stamps from World Star, as well as any Cat Shines from Bowser’s Fury, head on over to these pages:
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| Green Stars | Stamps | Cat Shines |
Green Star #1
After you drop through the big hole, grab the Green Star from behind the little purple enemies. You can take out the enemies while in your Mega form or by interacting with them on the GamePad.
Green Star #2
Mega Mushroom required! During your second run with the Mega Mushroom, ground pound on the bouncy orange mushroom to break through two layers of brick blocks. This will give you access to the second Green Star.
Green Star #3
Before you enter the green warp pipe, swim up to find a hidden area with a second green warp pipe. Enter it and hit the switch in the next room. Hit the Question Block to reveal a Mega Mushroom that will help you grab all the Blue Coins. Collect them all within the time limit to earn a Green Star.
Stamp Location
Mega Mushroom required! Before you crash through the giant brick blocks, break the ones above the sign to find the Stamp.
Check out our World Star-8: Peepa’s Fog Bog guide for green star and stamp locations for the next level.
Use the links below to jump to different sections of our guide.
| Super Mario 3D World + Bowser’s Fury (Guide Hub) |
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Green Stars Walkthrough | ||
| W1 | W2 | W3 | W4 |
| W5 | W6 | W🏰 | W🐲 |
| W🌟 | W🍄 | W🌸 | W👑 |
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Stamps |  |
Cat Shines |