King Boo

"Let's see if you can find out which one is the real... ME!?"

King Boo is a boss character in Prismverse Saga. It's the leader of Boos, and the guardian of the Star of Shadows. He is fought at the end of Haunting Reverie Mansion.

History
King Boo first appeared in Super Mario Sunshine as a regular boss, but in Luigi's Mansion series, it became the main antagonist of Luigi there. During its fights against the green thunder, it showed what it's really capable of.

King Boo also made appearances in spinoffs, like Mario Kart and Mario Party series, as a boss.

In Prismverse Saga
King Boo first appears in SMATSP as one of the world bosses, fought at the final level of Ghastly Graveyard: Haunting Reverie Mansion. It had given quite the challenge to the heroes, but defeated at the end, eventually vanishing for good with its influence on the Star of Shadows as well.

Its future appearances are unknown.

Boss Battle
King Boo has 3 phases:

Phase 1:


 * Starts the fight with a clone. Blue Bricks are summoned to damage the boss. You need to hit the correct one to proceed to the next subphase.
 * Hitting the wrong King Boo will cause it to taunt the player, killing all clones will summon a flock of boos.
 * This happens in all subphases where King Boo and its clones appear.
 * After defeating the correct King Boo, 4 Boos are spawned. Kill them all to proceed to the next subphase.
 * King Boo returns, with 2 clones. Defeat the correct one to transition into Phase 2.

Phase 2: (Survival Phase)


 * 4 Eeries spawn from both directions every 3 seconds. Survive them for 20 seconds to transition to the next phase.

Phase 3:


 * King Boo returns, with 4 clones. Defeat the correct one to proceed to the next subphase.
 * After defeating the correct King Boo, 10 boos are spawned. Kill them all to proceed to the next subphase.
 * King Boo returns, with 5 clones. Defeat the correct one to proceed to the next subphase. 3 Eeries spawn in total from both directions every 3 seconds occassionally as well.
 * After defeating the correct King Boo, 5 Eeries spawn in total from both directions every 3 seconds. Survive 20 seconds to proceed to the next and final subphase.
 * King Boo returns, with 6 clones. 3 Eeries spawn in total from both direction every 3 seconds, in a cosine pattern. Defeat the correct one to complete the boss battle.

Trivia

 * The music used in the first phase of King Boo's battle is Rooftop: King Boo (Phase 1) from Luigi's Mansion 3.
 * The music used in the second phase of King Boo's battle is Rooftop: King Boo (Phase 2) from Luigi's Mansion 3.
 * King Boo is one of the bosses that gain a transformation from the Star Prisms they use.
 * In its case, King Boo's crown dons a purple hue as well as its eyes and tongue gaining the same color.

Lore
King Boo, true name unknown, is a powerful apparition, born from various matrices, like fear. It was born as a typical ghost, but eventually evolved into the recent species of ghosts back then, called Boos, with the primary object of scaring mortals. But King Boo managed to do more than that: Not only it was able to scare mortals, it had the mysterious, never-seen ability of spirit severing. In other words, taking the souls of mortals it managed to scare off.

This ability's reveal was a breakthrough for many Boos at that time. Due to this separation alone, it was crowned as the leader of them, thus gaining its current state of name everyone knows as today. And ever since that time, King Boo has taken the souls of many mortals that were scared off and they were trapped in paintings, where they reside in its mansion to this day. Even it managed to capture the soul of Mario, three times to be exact, as well as the souls of other well-known people, but they were, in fact, the only ones to be freed of their eternal prisons.

The rest of King Boo's story remains in dark fogs, still unknown to this very day. The one that gave it the special ability, who was it? What was its origins? The world will never know.