Ghastly Graveyard

Ghastly Graveyard is the sixth world of this episode, themed around graveyard. It can be accessible by collecting 105 Power Stars, and features a total of 7 levels, a secret level, 2 extra levels and a town level, divided into two subsections.

This world's main boss is King Boo from Luigi's Mansion, who holds Star of Shadows in its possession.

Levels
Ghastly Graveyard:


 * 6-1 - Venomous Woods
 * 6-2 - Morganite Caverns
 * 6-3 - Crystalling Burial Site
 * 6-4 - Aranha's Mausoleum (Boss: Aranha)
 * 6-A - Spirit Train
 * 6-EXTRA 1 - Pumpkin Patch Panic
 * 6-SHOP - Haunted Market

Hazy Necropolis:


 * 6-5 - Gloomy Boneyard (Boss: Boohemoth)
 * 6-6 - Toxic Boardwalk
 * 6-7 - Haunting Reverie Mansion (Boss: King Boo)
 * 6-EXTRA 2 - Poenari Mountain

Cutscenes:


 * The Guardian of Graveyard
 * Illusions of Fear
 * World 6 Completed!

Trivia:

 * The music used in the worldmap is SMB1 Ghost House (Maker) from Super Mario Maker 2.

Lore:
The Ghastly Graveyard is the site of a once-prosperous civilization, that perished in an unfortunate event that is still unknown to this day, but rumored to be a supernatural assault done by dark spirits. Now it is home to a diverse selection of ghosts and spirits, including nature spirits that have immigrated from Sylvan Woods south of the land, as well as Boos, wind spirits and even sea spirits. There are various wonders of these lands even if it's full of apparitions: A train that you can take and have a chat with spirits that ride on and see the unseen corners of these lands, an ancient castle that once belonged to a dark lord, that was vanquished years ago and sealed in a coffin, and pay respects in the lair of a shadowy guardian.

Hazy Necropolis is what remains of this civilization's birthplace, with houses and mansions being abandoned and now owned by ghosts and other spirits.

But King Boo's actions to use Star of Shadows for its own benefits have brought a plague upon these sacred haunted lands: the entirety of the lands have turned to purple, the waters became poisonous toxic goo and the air has gained a shadowy haze that can corrupt a spirit if overwhelmed... These recent disasters might have caused havoc, but it can be stopped. It's unknown if these effects can be fully reverted, though...