Releases

Characters

Notes:

• Professor Oya Mā (E. Gadd) was designed by Yoshiyuki Oyama, one of the four Luigi's Mansion character designers. Oyamā is also an expression meaning "good heavens!"

Items

Notes:

• Obakyūmu is a play on words, combining obake ("ghost") and bakyūmu ("vacuum").

Boos

Notes:

• Since Boos are called Teresa in Japan, the Japanese Boo names here are probably puns like the English names. The Japanese names don't appear to have any other relation to the English names, however.

Portrait Ghosts

Notes:

• Mieru (Madam Miēru) means "to be seen; to be in sight."
• Nobasu (Se Nobasu-chan) means "to lengthen; to stretch."

Rooms

Sounds and music

A lot of small changes here...

Ball Room
The music that plays when Luigi first enters the Ball Room was not in the Japanese game.

Portrait Ghost-busting
The U.S. version has new music that plays when Luigi sucks up portrait ghosts. The Japanese version used the same music for sucking up both normal and portrait ghosts.

In the Japanese version, if a room has special background music, the ghost sucking music won't play as a portrait ghost is sucked up.

• Example from the Conservatory battle: Japanese | U.S.

Mr. Luggs
When Mr. Luggs goes crazy and speeds up, the U.S. version has "panic" music, whereas the Japanese version has no music at all.

Secret Altar
In the Japanese version, Luigi whistles while he's in the Secret Altar. In the U.S. version, he does not.

Observatory
Originally, the same twinkly star-gazing music played during Luigi's visit to the Observatory. The U.S. version replaced it with piano music when the walls open up, and a new harp melody when the path to Mario's star appears.

Bogmire battle
A couple seconds after Luigi screams during the Bogmire battle intro, a short sound effect was added for Bogmire in the U.S. version.

Slight changes to the battle music occur at 0:34 (pitch change) and from 0:39 to 0:44 (lack of bass drum in U.S. version).

King Boo battle
Near the end of the cut-scene before the King Boo battle, Luigi whimpers a bit in the Japanese version, but stays silent in the U.S. version. The cut-scene music also had some timing and pitch changes.

• Luigi voice removal: Japanese | U.S.

During the King Boo battle, Bowser will throw spiked balls that land with a thud. But not in the Japanese version, where they don't make any sound when they hit the ground.

Miscellaneous
During the Chauncey battle, after his HP drops to 50 or lower, the U.S. version has a new sound when the horses fly in to attack Luigi.

The boss defeated theme has a drumroll build-up in the Japanese version, and a simultaneous bass drum and cymbal crash added at the end in the U.S. version.

• Boss defeated sound clip: Japanese | U.S.

When Mario shoots out of the machine and hits Luigi during the ending sequence, there is a second sound shortly after the impact (before Luigi says "Mamma-mia"). The Japanese version didn't have this sound.