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Super Mario 3D All-Stars

Hidden Green Star: The Secret of Buoy Base

Ben Chard
Jarrod Garripoli
, &
Seren Morgan-Roberts


This page offers a guide on how to find the Hidden Green Power Star in The Floating Fortress level in Buoy Base Galaxy. This is the first Green Star available to the player. There are three Green Stars in the game and they are required to unlock the Trial Galaxies.

Reveal the Warp Pipe

Firstly, you’ll need to find the caged warp pipe under the water during The Floating Fortress level. Nearby to the caged warp pipe is a Torpedo Ted spawner. Guide the Torpedo Ted into the cage to reveal the warp pipe.

Use Torpedo Ted to blow up the cage and reveal the warp pipe.

Guide the Bullet Bills

In this next area, multiple Bullet Bills will spawn along a path. Your task is to guide at least one of the Bullet Bills along the path then up to the caged Green Power Star. This is easier said than done as there are Big Amps circling the cage that will explode the Bullet Bills if they hit them. If you need to, take the Bullet Bills around the platform a little and wait for an opening instead of heading straight from the path to the caged Green Star.

(1 of 2) You’ll need to guide a Bullet Bill into the Green Star’s cage

You’ll need to guide a Bullet Bill into the Green Star’s cage (left), all whilst avoiding the enemies yourself - Tricky! (right)

Green Power Stars

Upon grabbing the Green Star, Rosalina will tell you about the Green Luma who is the Guardian of the Trial Galaxies. He needs you to collect two more of these elusive green stars so he can power the Star Launcher to the Planet of Trials.

There are three Green Power Stars to collect!

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Guide Information
  • Publisher
  • Platforms,
  • Genre
    Action Adventure, Platformer
  • Guide Release
    24 September 2020
  • Last Updated
    8 February 2021
    Version History
  • Guide Author
    Seren Morgan-Roberts, Jarrod Garripoli, Ben Chard

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This guide for Super Mario 3D All-Stars offers a walkthrough for all three Mario classics.

Inside this guide you will find:

A 100% Walkthrough - For Super Mario 64, Super Mario Sunshine and Super Mario Galaxy.

A complete guide on Super Mario 64, including:

  • A layout of Peach’s Castle, with each course’s location pinpointed, as well as an overview of each course.
  • Walkthroughs for every star, including all courses’ 100-coin star.
  • How to get each of the power-up caps.
  • The location of every single Secret Star found in Peach’s Castle.

A complete guide on Super Mario Galaxy, including:

  • A Dome Overviews page outlining every galaxy found in each Dome.
  • Walkthroughs for every star, including hidden stars and comet stars, found in each galaxy.
  • A guide on how to unlock the Planet of the Trials galaxies.
  • Detailed coin-by-coin walkthroughs of Purple Coin levels.

A complete guide on Super Mario Sunshine, including:

  • Walkthroughs for every shine in every episode.
  • How to find every Blue Coin.
  • Strategies on how to secure 100 Coins on every Course.

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