* ''[[VideoGame/LuigisMansion Luigi's Mansion]]''. You go around sucking up ghosts for a little old man who turns them into paintings. While some of the ghosts, like Bogmire, are simply monstrous constructs, many of the ghosts are the ghosts of people, as in people who ''died''. Think about that: not only are you trapping the restless souls of the formally living against their will, you're also ''flattening their very souls into paintings''! In other words, [[AlternativeCharacterInterpretation E. Gadd is a madman who uses]] ''[[AlternativeCharacterInterpretation human souls]]'' [[AlternativeCharacterInterpretation as decorations for his underground lair]]. To top it all off, one of the ghosts is a ''one-year-old child.''
** Or you could turn it around. All those paintings are haunted. While you're looking at them, they're looking back.
** Then again, this one year-old child was born a ghost. Plus, E. Gadd may be senile, but he isn't evil: the ghosts in ''Dark Moon'' who work for him are well-behaved and kind as long as the Dark Moon is around, so if the portrait ghosts actually did behave likewise, they'd be free to roam around as well.
* And then there's the heart quotes. Most of these are harmless little tidbits of speech that the ghost is keeping to themself. But then there's Sue Pea. It's a hint at how to beat her, but think. What if that quote was her last words?
* It gets worse. There's a bug in one part of the game that shows [[http://i86.photobucket.com/albums/k92/Aska49/luigismansion0000.jpg Luigi's shadow on a wall]], floating... or rather, [[DrivenToSuicide hanging]] in the air. [[UnfortunateImplications Dear God...]]
* To people who played ''VideoGame/PaperMario'', Luigi's cowardice seems weird. In that game, he was eager and adventurous. However, if you read his diary at one point, you can see he was already scared of ghosts. And the first game with Luigi's fearful personality? ''Luigi's Mansion'', where he has to travel through a haunted mansion. Luigi is ''traumatized''. [[ThereAreNoTherapists And nobody seems to be helping him]].
** Yet somehow through all this traumatization, he took out an army of ghosts by himself.
* There's those two ghost twin children who love to play hide and seek, nothing inherently wrong with that right? Well if you happen to find a diary in the study, reading an entry reveals that they both like to hide during the game, sometimes causing the game to go on for a very long time...oh dear.
** If you continue to read the diary, you'll realize that one of the twins is susceptible to cold. This is because planes weren't protected from the weather when they were first built by Orville and his brother.
* So WordOfGod is that Chauncey was actually born a ghost, so he isn't a dead baby after all!...Or maybe not. Being born a ghost could mean that's he's the result of a miscarriage.
* It's believed by some that King Boo's [[spoiler:Bowser "mech"]] isn't a mech at all, but rather [[spoiler:Bowser's corpse, with the Koopa King having been killed by Mario in a previous game]].


* Wondering why does King Boo doesn't have his Jewel Crown in later games? Because Luigi sold it to buy his new mansion (even though the jewel is worth 1 COIN).