This is a walkthrough for all gems in B4 Pool Party, as well as how to clear the level and find the boo in Luigi's Mansion 2 HD for the Nintendo Switch. Read on for a detailed guide for B-4 Pool Party, including how to get 3 stars, gem locations, location of the boo, as well as the secret door location.

Previous Mansion							Current Mansion							Next Mansion
Gloomy Manor							Haunted Towers							Old Clockworks
B-1			B-2			B-3			B-4			B-5			B-Boss			B-Bonus

B-4 Pool Party Gems and Boo Location Map

Jump to a Section!
Map	Guide	Gems
Boo	Secret Door	Enemies

These are all of the Gems available within this Mansion, however some Gems are exclusive to specific Missions.

Interactive Map of All Mansions

B-4 Pool Party Walkthrough

Jump to a Section!
Map	Guide	Gems
Boo	Secret Door	Enemies

B-4 Pool Party How to Get 3-Stars

Min. Clear Time	Min. Ghosts Captured	Max. Health Lost	Min. Treasure
18:00	17	70	855

These numbers are values we got based on our runs. If you got 3-Stars with better scores, take pride in it and share a picture in our Missions Record Boards!

B-4 Pool Party Objectives

Goal	Reach the Rooftop Pool, and look around for the special key.
Description	The toad you rescued in the Crypt managed to bring back a snapshot from my tridimensional security camera! Let's take a look at it.

1. Reach the Rooftop Pool
2. Look for the Special Key

Reach the Rooftop Pool

Entrance

After looking at the image, you will then be taken to the Entrance. Examine the tree on the east side for a Gold Greenie. After getting that, head inside.

Courtyard and Tower Lobby

After getting to the courtyard, don't bother with the flytrap monsters, just head west into the Tower Lobby. Once there, there are multiple flowers that will drop down and attack, but you can dodge and suck them up for some Gold. You can go to the garden for more money, but head to the Plant Nursery to progress.

Along the way, be sure to fix the missing pipe above the stairway and turn the valve.

Plant Nursery

At the north side of the room, there is a chest you can Darklight, but the main goal here is to water the plant in the middle. Turn on the valve at the southeastern corner of the room, grab the bucket, and fill it up. This will make the plant grow but ignore that for now and head to the Skybridge.

Tower Lobby and Skybridge

Head out of the Plant Nursery and make sure not to step on the carpet. Head into the Skybridge and pull on the flowers on the ceiling. The last one should have the Octagon Emerald. After getting the Gem, you can head back into the Plant Nursery.

Plant Nursery and Rumpus Room

Once you're back to the Nursery, head up the plant and you will be in the Rumpus Room. Theres not much in this room other than a few Greenies in the Blue Jack-in-the-Box and the Oval Emerald inside the huge doll. Spin around the doll counterclockwise and its head will eventually unscrew. Head out of the room through the door in the southeast corner.

Family Room

You can get some gold if you use the Dark-Light to reveal a cabinet right next to the sink. Head west and use your Dark-light device on the imprint on the wall to reveal a painting. Once revealed, interact with it to reveal Boo B. Trap so go ahead and capture it. Go through the door on the left to get to the Solarium.

Solarium

On the table, use your Dark-light to reveal a chest which contains the Spindle Emerald. Pull on the red ball connected by a chain to reveal a set of stairs, head up and there's hearts inside a toolbox. You can proceed to the West bedroom by going into the door to your right.

West Bedroom

Head inside and spin the fan with your Poltergust to reveal some beds and Hiders having a pillow fight. Pull on the covers to reveal one and catch it, the beds will then shuffle and you have to find each one this way. After catching all the Hiders, they will drop a Key. Grab it and use it, heading east to proceed.

West Hall, Crow's Nest, and Conservatory

Out the West Bedroom, head east and pass through the West Hall and Crow's nest to get to the Conservatory. Grab a Balloon bulb and head up to the right where there's a golden bulb and an imprint of a door. Use your Dark-light on the imprinted wall to reveal a Door to an unknown location.

Inside the door, you have to grab all of the Red Coins, so go counterclockwise and collect the ones in the outer path and go under to get the rest upstairs. After collecting all red coins, you will be rewarded with the Coffin Emerald.

Head out and use the Gold Bulb to grab some coins to get a chest in the lower area, grab the treasure and then head up to the southwest corner. Make sure to not step on the rug as that will put you back down. Head out the door to get back to a higher floor of the Crow's Nest.

Crow's Nest, Conservatory, and West Hall

Outside, grab the key using your Dark-light from the frame and head back inside the Conservatory. Backtrack you way back into the West Hall and use they Key you got to unlock the West Bathroom.

West Bathroom

Head inside and there will be a Slammer right behind you reflected in the mirror, so capture it and head east. You will then come across some Greenies, one with sunglasses, so get the sunglasses first and you can suck them up in one go. Last, theres a Creeper near the toilets, so just deal with it as you did in Gloomy Manor.

After all the ghosts are gone, pull on the toilet paper next to the leftmost toilet and grab yourself the Mushroom Emerald. Afterwards, you can lay on the lawn chair and you will be taken to the Rooftop Pool.

Look for the Special Key

Rooftop Pool

Once getting onto the Rooftop Pool, you will notice there's a frog statue missing in the top left corner of the pool. Use your Dark-light to reveal it and the Secret Key will appear. The Pink Sneakers will then snatch the Key from Luigi, so catch them with your Poltergust to get it back!

These Sneakers are pretty straightforward, but you can use the ripples in the water to see where they're scurrying around. Once you get all of them, you will not get the Secret Key as the Polterpup will take it and run off. The stage ends here.

B-4 Pool Party Gem Locations

Jump to a Section!
Map	Guide	Gems
Boo	Secret Door	Enemies

Available Gems
#1					#2					#3					#4
#5					#6					#7					#8
#9				#10				#11				#12				#13

Grayed out Gems are unavailable on this mission.

Gem #1 (Circle Emerald)

Gem	Circle Emerald
Where to Find	Tower Lobby

Head towards the area behind the first flight of stairs in the Tower Lobby. From there, acquire the gem you find in the area.

Gem #3 (Rectangle Emerald)

Gem	Rectangle Emerald
Where to Find	Garden

Use the Poltergust to water the flower located on the southeast portion of the area. After the flower blooms, flash it with the Strobulb to reveal the hidden gem.

Gem #4 (Football Emerald)

Gem	Football Emerald
Where to Find	Botany Lab

Use the Poltergust to water the flower located on the northeast portion of the area. After watering the flower on the left and waiting for it to bloom, flash it with the Strobulb to reveal the hidden gem.

Gem #5 (Drop Emerald)

Gem	Drop Emerald
Where to Find	Seedling Laboratory

Proceed towards the shooter mechanism in the area, and shoot the mouse dashing around the room. Hitting it will grant you the hidden gem.

Gem #6 (Stone Emerald)

Gem	Stone Emerald
Where to Find	West Garden

Once you've gained access to the Maintenance area, fix the pipes by the stairs, then shoot a seed pod towards the giant flytrap in the area. From there, proceed towards the chest to acquire the hidden gem.

Gem #8 (Star Emerald)

Gem	Star Emerald
Where to Find	Old Graveyard

Upon entering the old graveyard, use the Poltergust to suck the Star Emerald that is hanging on a vine.

Gem #9 (Octagon Emerald)

Gem	Octagon Emerald
Where to Find	Skybridge

Head towards the Skybridge, avoid the attacks of the deadly plants, and after sucking up the third plant, it will drop the Octagon Emerald.

Gem #10 (Oval Emerald)

Gem	Oval Emerald
Where to Find	Rumpus Room

Head up to the Rumpus Room, walk around the big doll on the west side that is watching you until its head falls off, and the Oval Emerald will drop.

Gem #11 (Spindle Emerald)

Gem	Spindle Emerald
Where to Find	Solarium

Head towards the Solarium, use the Dark-Light Device on the table in the north where a chest originally was, and open the chest to obtain the Spinde Emerald.

Gem #12 (Coffin Emerald)

Gem	Coffin Emerald
Where to Find	Conservatory

Head towards the conservatory, suck up a bulb from a flower, use it to float towards the upper right platform, use the Dark-Light Device to reveal a hidden door, complete the time challenge, and open the chest to obtain the Coffin Emerald.

Gem #13 (Mushroom Emerald)

Gem	Mushroom Emerald
Where to Find	West Bathroom

Enter the west bathroom after getting a key for it, defeat all the enemies inside, pull the toilet paper on the west wall, and a Mushroom Emerald will drop.

Gem Locations: How to Find All Gems

B-4 Pool Party Boo Location

Jump to a Section!
Map	Guide	Gems
Boo	Secret Door	Enemies

Boo B. Trap Location

Boo	Where to Find
Boo B. Trap	Family Room

Enter the family room and use the Dark-Light Device on the left side of the kitchen area of the room, where a drawer originally was. The drawer is beside the sink, then suck up all the spirit balls to reveal the Boo.

All Boo Locations: Where to Find All Boos

B-4 Pool Party Secret Door

Jump to a Section!
Map	Guide	Gems
Boo	Secret Door	Enemies

Location	How to Find the Secret Door
Conservatory	Vacuum a bulb that's growing on the organ to float up to the east side of level F5. Use the Dark-Light Device at the wall to reveal the hidden door.

How to Beat the Challenge

When the challenge starts, follow the path to the east. When you reach the northwest area of the maze, move diagonally, then use and follow the path of the inner stairs of the maze.

All Secret Door Locations and Rewards

B-4 Pool Party Enemies

Jump to a Section!
Map	Guide	Gems
Boo	Secret Door	Enemies

Enemies Encountered in B-4 Pool Party

Greenie	Slammer	Hider
Sneaker	Creeper	Gold Greenie
Spider	Crow	Frog
Flytrap

Luigi's Mansion 2: Dark Moon Related Guides

All Mansions and Stages

All Mission Guides

Gloomy Manor
A-1		A-2		A-3
A-4		A-5		Boss
Bonus Mission
Haunted Towers
B-1		B-2		B-3
B-4		B-5		Boss
Bonus Mission
Old Clockworks
C-1		C-2		C-3
C-4		C-5		Boss
Bonus Mission
Secret Mine
D-1		D-2		D-3
Boss			Bonus
Treacherous Mansion
E-1		E-2		E-3
E-4		E-5		Boss
Bonus Mission
King Boo's Illusion
A Nightmare to Remember

Post-Game

Post-Game Guide
ScareScraper Guide	Ending and Post-Game Content	100% Checklist

ScareScraper Records Board