Luigi's Mansion 3 Guide: 9F Unnatural History Museum Walkthrough

Publish date: 2024-07-23

This portion of the Luigi's Mansion 3 guide includes the Unnatural History Museum Walkthrough and all the Unnatural History Museum gem locations. Here, you'll also find tips and tricks for how to beat the dinosaur skeleton boss waiting for you in the main exhibit.

Below are the walkthrough sections and objectives. Please note we may have added a few objectives ourselves to indicate the steps you need to take to complete the main objective.

Unnatural History Museum Gems

You can get all the Unnatural History Museum Gems on your first visit. All gem locations will be written in a blue box so scroll through for them to see what you're missing or scroll past them if you'd rather discover the answer to those puzzles yourself.
Take a look around the museum. Every gem on this floor is in this area but a few can’t be retrieved until after you get the elevator button.

Unnatural History Museum Gem #2

Vacuum the desk chairs so it spins.

After it spins for a while, the area will flip over to reveal a treasure chest. Open it and a gem will pop out.

Unnatural History Museum Gem #3 Once you exit the elevator, head to the hallway on the left. The one with bones and flowers. Vacuum the flowers. Then flash the blinking light that's on the column using your Strobulb.This will cause the fossil to move and reveal a safe. Flash the light on the safe with the Strobulb to open it. A gem will be revealed.

When you’re done exploring the area have Luigi and Gooigi each pull on the ropes to open the curtained doorway.

Approach the toad portrait but get ready to fight.

Nothing like museum displays coming to life. This dinosaur skeleton only has a few attacks but figuring out how to do damage is where it gets tricky.

Shoot the dino eggs into the dinosaur

Vacuum up the dino egg (there's one on the left and right, either is fine). Then, aim and shoot it at the dinosaur. It will chomp on it with its mouth.

While the dinosaur is chomping away, vacuum and shoot the other dino egg into the dinosaur's glowing red chest.

Watch out for the falling debris.

Next, you’ll need to find something else for the dinosaur to chomp on that isn't the dino egg.

Send poor Gooigi out there as a sacrifice. The dinosaur will chomp on Gooigi and when it does vacuum and shoot the egg out at the dinosaur's chest.

Watch out for the dinosaur's screeching attack. Next the dinosaur will stomp around and swing its tail.

Shoot small fossils at the dinosaur

Vacuum the fossily debris and then shoot it at the dinosaur's glowing red chest.

Fight the caveman

Avoid the caveman's attacks. Wait for him to float up high and hold his bone with both hands, raising it behind his head.

After this, he will slam it into the ground and send a shockwave you need to use your Burst move to jump over it.Luckily, this causes him to get stuck. This is when you can attack. Flash him with the Strobulb and vacuum/slam him. Do this 2 more times and he'll be captured and the elevator button will appear.

Walk up to toad's portrait and shine your Dark Light on it to free the toad

Walk this adorable pal to the elevator. But before you leave you can use him to get some gems on this floor.

Unnatural History Museum Gem #6

As soon as you exit the exhibit hall, head right. Vacuum toad and shoot him at the glass case with the yellow gem inside it. This will break the case and reveal the gem.

Unnatural History Museum Gem #1

Continue to the right, moving forward towards the elevator. Vacuum toad to shoot him at the case holding the vase and stacks of coins. Breaking that vase will reveal a ghost who has a gem inside it. Capture it to get the gem.

Unnatural History Museum Gem #5

On your left there’s another glass case with a single orb inside. Vacuum up the toad, aim him at the glass, shoot him out to break it.

Once the glass is destroyed, shine your Dark Light on it. Suck up the ghost orbs, as usual, and get a gem.

Unnatural History Museum Gem #4

Before you leave shoot toad at the pterodactyl strung above you. A gem will fall out.

Interact with the elevator to send toad on his way. Then, get inside yourself to install the elevator button and continue to floor B2, Boilerworks.

Related Pages

Janet Garcia is an editor and strategy guide writer at IGN. She has played both Luigi's Mansion, Luigi's Mansion Dark Moon, and now Luigi's Mansion 3. After speaking to Nintendo representatives about Luigi's Mansion 3 at E3 2019 and doing extensive research on Gooigi, she felt more than ready to take on every floor of this hotel. For more haunted content, you can follow her on Twitter @Gameonysus.

Additional edits and images by Aiden Strawhun. Follow them on Twitter @AStraww.

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