King Boo's Illusion

King Boo's Illusion is the final area in Luigi's Mansion: Dark Moon. It is where Luigi battles the Tough Possessor and King Boo, as the final boss.

History
After Luigi stabilizes the world's dimension, he enters the portal to find the last Dark Moon piece. Upon arriving, Luigi winds up in a large room with knight statues. Here, Luigi battles the Tough Possessor which possesses multiple suits of armor and a gigantic suit of armor as a last attempt to defeat Luigi.

Upon defeating the Tough Possessor, Professor E. Gadd tries to pixelate Luigi out, to meet him in the Bunker. However, the transmission is intercepted by King Boo, and Luigi is placed back into the illusion world. King Boo then starts taunting Luigi by making windows visible, where the player can see King Boo's silhouette outside, and laughing at him. After the taunting, Luigi looks up, only to see Mario trapped in a painting. He reaches out, but King Boo appears behind the painting, which turns out to be a illusion. He then starts talking to Luigi, about his incarceration in a painting and about his escape. He then announces that "he returned to paint the town red" and become the supreme ruler of the Mushroom Kingdom. He then accumulates energy from his crown, and reveals the arena for Luigi and King Boo's battle. The arena is surrounded by electricity. However, it will not inflict any damage to Luigi.

In-Game Description
''King Boo has created the ultimate illusion, and he's waiting for you to show yourself. Are you brave enough to face him in his own territory once again?''