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Luigi's Mansion: Dark Moon / gems, Boos, bonus missions and upgrades

Luigi's Mansion: Dark Moon gems, Boos, bonus missions and upgrades

Track mansion collections without confusing their rewards.

Pictures for this guide

Luigi faces several purple ghosts inside a cluttered room.Luigi faces several purple ghosts inside a cluttered room.Luigi works beside a large clock face in Old Clockworks.Luigi works beside a large clock face in Old Clockworks.E. Gadd comments on the missing clock hands in Old Clockworks.E. Gadd comments on the missing clock hands in Old Clockworks.
Edition covered

Original Nintendo 3DS game, called Luigi’s Mansion 2 in Europe and Australia. The Switch remaster is Luigi’s Mansion 2 HD. Official 3DS online play ended in 2024; local ScareScraper remains distinct.

Collect thirteen gems per mansion

Luigi vacuums near a desk while a purple ghost floats overhead.
Luigi vacuums near a desk while a purple ghost floats overhead.

Five sets of thirteen create a total of 65 gems. Their type identifies the mansion, but individual gems may require a particular mission or puzzle state.

Gem sets
MansionGem typeCount
Gloomy ManorAmethysts13
Haunted TowersEmeralds13
Old ClockworksRubies13
Secret MineSapphires13
Treacherous MansionDiamonds13

Use Dark-Light while hunting Boos

Boos hide behind invisible objects and other room tricks. Restore suspicious missing furniture and inspect the room after ordinary ghost encounters.

Collection rewards
GoalReward or purposeCheck
Mansion BoosUnlock its infestation missionMission Boo markers
Gem setComplete mansion gem displayThirteen slots
Collected moneyEquipment upgrade progressE. Gadd’s upgrade meter
Gold BoneOne revival in the current outingCarry it before health reaches zero
Full VaultPart of an E. Gadd medal goalIncludes ScareScraper ghosts too

Catch a mansion’s Boos for its bonus mission

The special infestation mission unlocks through that mansion’s Boo collection. Gem completion is a separate gallery goal and does not substitute for the required Boos.

Gather money for equipment upgrades

Treasure contributes to E. Gadd’s cumulative upgrade progress. Stronger vacuum pulls and improved Dark-Light capacity support later missions, while gems remain their own collection.

References
Guide references
ReferenceWebsite
Nintendo original electronic manualcsassets.nintendo.com
Game and mission referencewww.mariowiki.com
Gem referencewww.mariowiki.com
Boo locations referencewww.mariowiki.com