Earlier leftover ghosts designs for ‘obake01’ and ‘obake02’.
From what little information lies upon these two designs, they are actually the two ghosts seen in the Spaceworld 2000 FMV.
The teal-colored ghost was the first spectre Luigi had encountered when he first entered the mansion. I hear the ghost tries to attack Luigi by trying to bite him or something across those lines. Luigi then dashes away from the ghost, sliding down a banister, dodging a falling chandelier, then being scared out of his mind. I would believe he now runs to the Foyer in hopes of hiding from the ghost. This isn’t the case as he is now surrounded by several ghosts sporting a bulbous nose. These guys are utilizing the green ghost’s design. Another possible theory is that Luigi fleed to the Foyer to look for a hiding spot. But instead, he catches sight of three ghosts playing some sort of card game (I assume poker). Now what is strange is that the ghost on the very right is donning a toupée. It is always strange to go back and look at a specific game’s development cycle. Some hardly change, some have such drastic changes you almost wonder why they overhauled the entire game.
Photos come from Luigi’s Bigger Mansion.