Bouldergeist is a ghost with the power to control rocks in the Ghostly Galaxy. He holds one of the Power Stars and was the one who presumably captured Luigi. He reappears in the sequel, Super Mario Galaxy 2 as one of the bosses faced in the Boss Blitz Galaxy, presumably to get his revenge.
Strategy
Bouldergeist makes his lair on the Bouldergeist Battle Planet. When Mario makes his way here and encounters him, Bouldergeist assembles his stone armour suit and strikes.
Bouldergeist's main attack is throwing rocks, boulders and stones at Mario. They are quite easy to avoid if the player runs in a straight line. However, he'll occasionally summon a straight line of rocks, which hurts Mario if he's caught in it and restricts Mario's moving space. To defeat Bouldergeist, Mario must use his Star Spin get the Bomb Boos produced from the black rocks the monster throws. After three hits, he transforms into his true form: a black ghost. Then he'll try to run, spawning Bomb Boos in his wake. The player must use the Bomb Boos to hit him. In his second phase, the monster grows rock hands. These rock hands gives him new attacks such as slamming them into the ground or trying to punch Mario. Plus, the rock geyser attack makes two lines instead of one. Simply apply the first strategy, but the right hand would restrict you from hitting the body. After Bouldergeist loses his stamina, the ghost's core explodes, and Mario can get his hands on the Power Star dropped. Bouldergeist retains his strategy in Super Mario Galaxy 2's Boss Blitz Galaxy.
Daredevil Mode lives up to the name: Bouldergeist's frantic attacks could instantly defeat Mario if you are not careful.
Trivia
- Bouldergeist is a portmanteau of the word "Boulder" and "Poltergeist."
- Bouldergeist is very similar to Thardus in Metroid Prime.
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| Bosses | Bosses | Dino Piranha • King Kaliente • Mandibug Stack • Bugaboom • Megaleg • Kamella • Tarantox • Topmaniac • Bouldergeist • Major Burrows • Baron Brrr • Undergrunt Gunner • Heavy Metal Mecha-Bowser • Kingfin • Fiery Dino Piranha • Bowser Jr. • Bowser |
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| Kitchen | Beach Bowl Galaxy • Ghostly Galaxy • Bubble Breeze Galaxy • Buoy Base Galaxy • Drip Drop Galaxy • Bowser Jr.'s Airship Armada | |
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| Garden | Deep Dark Galaxy • Dreadnought Galaxy • Melty Molten Galaxy • Matter Splatter Galaxy • Snow Cap Galaxy | |
| Comet Observatory | Bowser's Galaxy Reactor | |
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| Objects | Objects | ? Block • Airship • Arrow Sign • Arrow Switch • Assembly Block • Banandelion • Beacon • Blue switch • Bob-omb Dispenser • Bolt (object) • Bolt (platform) • Bowser Statue • Brick Block • Bubble • Bubbler • Cannon • Cloud • Coconut • Coin Block • Conveyor Belt • Crate • Empty Block • Flip Tile • Flipswitch Panel • Floaty Fluff • Flower (platform) • Flowerbed • Gold Shell • Gold Treasure Box • Gravity spotlight • Green Shell • Ground-Pound Switch • Honey wall • Honeycomb • Item Crystal • Key Door • Launch Star • Leaf pile • Lever Switch • Lift • Matter • Nail • Ocean Small Turtle • Pole • Portrait • Pull Star • Ring (Rolling Ball) • Ring (underwater) • Rock spire • Rolling Ball • Semisolid Platform • Shock Wave Generator • Shrinking platform • Sliding block • Sling Pod • Sling Star • Snowman • Springboard • Sproutle Vine • Stalagmite • Star Piece Cluster • Starshroom • Stone block • Stone circle • Stone Wheel • Stretch Plant • Swing • Tiny lamp • Torch • Tornado • Trash • Treasure chest • UFO • Valve • Vine • Warp Pad • Warp Pipe • Watermelon • Water spout |
| Moves | Moves | Backward Somersault • Co-Star Super Jump • Crawl • Crouch • Dash • Double kick • Double Jump • Ground Pound • Long Jump • Jump • Side Somersault • Star Spin • Swim • Triple Jump • Wall Jump |
| Missions | Gateway Galaxy | Grand Star Rescue • Gateway's Purple Coins |
| Boo's Boneyard Galaxy | Racing the Spooky Speedster | |
| Good Egg Galaxy | Dino Piranha • A Snack of Cosmic Proportions • King Kaliente's Battle Fleet • Dino Piranha Speed Run* • Purple Coin Omelet* • Luigi on the Roof | |
| Honeyhive Galaxy | Bee Mario/Luigi Takes Flight • Trouble on the Tower • Big Bad Bugaboom • Honeyhive Cosmic Mario/Luigi Race* • The Honeyhive's Purple Coins* • Luigi in the Honeyhive Kingdom | |
| Loopdeeloop Galaxy | Surfing 101 | |
| Flipswitch Galaxy | Painting the Planet Yellow | |
| Bowser Jr.'s Robot Reactor | Megaleg's Moon | |
| Sweet Sweet Galaxy | Rocky Road | |
| Space Junk Galaxy | Pull Star Path • Kamella's Airship Attack • Tarantox's Tangled Web • Pull Star Path Speed Run* • Purple Coin Spacewalk* • Yoshi's Unexpected Appearance | |
| Rolling Green Galaxy | Rolling in the Clouds | |
| Battlerock Galaxy | Battlerock Barrage • Breaking into the Battlerock • Topmaniac and the Topman Tribe • Topmaniac's Daredevil Run* • Purple Coins on the Battlerock* • Battlerock's Garbage Dump • Luigi under the Saucer | |
| Hurry-Scurry Galaxy | Shrinking Satellite | |
| Bowser's Star Reactor | The Fiery Stronghold | |
| Sling Pod Galaxy | A Very Sticky Situation | |
| Beach Bowl Galaxy | Sunken Treasure • Passing the Swim Test • The Secret Undersea Cavern • Fast Foes on the Cyclone Stone* • Beachcombing for Purple Coins* • Wall Jumping up Waterfalls | |
| Bubble Breeze Galaxy | Through the Poison Swamp | |
| Ghostly Galaxy | Luigi and the Haunted Mansion • A Very Spooky Sprint • Beware of Bouldergeist • Bouldergeist's Daredevil Run* • Purple Coins in the Bone Pen* • Matter Splatter Mansion | |
| Buoy Base Galaxy | The Floating Fortress • The Secret of Buoy Base | |
| Bowser Jr.'s Airship Armada | Sinking the Airships | |
| Drip Drop Galaxy | Giant Eel Outbreak | |
| Gusty Garden Galaxy | Bunnies in the Wind • The Dirty Tricks of Major Burrows • Gusty Garden's Gravity Scramble • Major Burrows's Daredevil Run* • Purple Coins on the Puzzle Cube* • The Golden Chomp | |
| Freezeflame Galaxy | The Frozen Peak of Baron Brrr • Freezeflame's Blistering Core • Hot and Cold Collide • Frosty Cosmic Mario/Luigi Race* •Purple Coins on the Summit* • Conquering the Summit | |
| Dusty Dune Galaxy | Soaring on the Desert Winds • Blasting through the Sand • Sunbaked Sand Castle • Sandblast Speed Run* • Purple Coins in the Desert* • Bullet Bill on Your Back • Treasure of the Pyramid | |
| Honeyclimb Galaxy | Scaling the Sticky Wall | |
| Bowser's Dark Matter Plant | Darkness on the Horizon | |
| Bigmouth Galaxy | Bigmouth's Gold Bait | |
| Gold Leaf Galaxy | Star Bunnies on the Hunt • Cataquack to the Skies • When It Rains, It Pours • Cosmic Mario/Luigi Forest Race* • Purple Coins in the Woods* • The Bell on the Big Tree | |
| Sea Slide Galaxy | Going after Guppy • Faster Than a Speeding Penguin • The Silver Stars of Sea Slide • Underwater Cosmic Mario/Luigi Race* • Purple Coins by the Seaside* • Hurry, He's Hungry | |
| Toy Time Galaxy | Heavy Metal Mecha-Bowser • Mario/Luigi Meets Mario • Bouncing Down Cake Lane • Fast Foes of Toy Time* • Luigi's Purple Coins* • The Flipswitch Chain | |
| Bonefin Galaxy | Kingfin's Fearsome Waters | |
| Bowser Jr.'s Lava Reactor | King Kaliente's Spicy Return | |
| Sand Spiral Galaxy | Choosing a Favorite Snack | |
| Deep Dark Galaxy | The Underground Ghost Ship • Bubble Blastoff • Guppy and the Underground Lake • Ghost Ship Daredevil Run* • Plunder the Purple Coins* • Boo in a Box | |
| Dreadnought Galaxy | Infiltrating the Dreadnought • Dreadnought's Colossal Cannons • Revenge of the Topman Tribe • Topman Tribe Speed Run* • Battlestation's Purple Coins* • Dreadnought's Garbage Dump | |
| Matter Splatter Galaxy | Watch Your Step | |
| Melty Molten Galaxy | The Sinking Lava Spire • Through the Meteor Storm • Fiery Dino Piranha • Lava Spire Daredevil Run* • Red-Hot Purple Coins* • Burning Tide | |
| Snow Cap Galaxy | Star Bunnies in the Snow | |
| Rolling Gizmo Galaxy | Gizmos, Gears, and Gadgets | |
| Loopdeeswoop Galaxy | The Galaxy's Greatest Wave | |
| Bubble Blast Galaxy | The Electric Labyrinth | |
| Grand Finale Galaxy | The Star Festival | |
| Bowser's Galaxy Reactor | The Fate of the Universe | |
| Mini-games | Mini-games | Bob-omb Blasting • Bubble Blowing • Ray surfing • Star Ball Rolling |
| Other | Other | Comet Observatory • Starbit Festival • Star Pointer • Super Mario 3D All-Stars |
| Missions marked with an asterisk (*) are only available while a Prankster Comet is in orbit. | ||