There are two 20,000,000G Gold Diamonds in this game. One you get
catch your 50th boo (King Boo doesn't count as a boo).
Another way is a long process: After you get the water element
medal, go outside through the left door and beat the dog. When
you finish, get some water and spray some on the green
dot in the
dirt bed to the right of the doghouse. It should grow a little.
Then beat Bogmire. After you finish, give
the plant a second dose,
and it should turn into a flower. Finally, after you beat
Boolosous, give the plant a third
and final dose. After you do
that, you should get alot of money and a Gold Diamond the size
of Luigi's head!
Lots of Money:
After defeating the Butler in the Butler's room, use the Game Boy
Horror and scan the mousehole in the
corner by the door. This will
open up a portal to a secret room where, after defeating the
ghosts there, you can get
a ton of money.
Try to vacuum up any gold ghost mouse you see, you will get money.
Use the Game Boy Horror
to scan any pieces of cheese you see in the
mansion. This will automatically attract a gold ghost mouse. Vacuum
up and receive money.
After defeating Boolossus, water all the plants on the balcony.
Many of them will give you
jewels and gold bars.
After defeating the dog in the yard, water the budding plant in the
garden on the right
by the fountain. Remember to visit this area
periodically through the game and water the plant each time. Every
you visit and water it, the plant will grow bigger.
Eventually it will turn into a flower. The next time you visit it,
it will look like a round pod and will dispense a HUGE diamond.
Hold B + X and press Start while
Unlock Another Mansion and gallery mode:
Finish the game and save.
Shortcut to the main/lobby
of the mansion:
Switch to your Game Boy Horror's first person mode and examine
any mirror in the mansion with A. After
a really trippy warp
sequence, you will find yourself in the entrance hall of Luigi's
you run low on power, run to the first level bosses room and
there will always be a 50 pt heart in the chest next to the
If your under 50 hit points left. Exit room and go to main foyer
and return to room and repeat.