Boo Lore
Everything there is to know about Ghosts/ my version of Boos
Boos belong to Nintendo this is just my interpretation as there is a lot of things left for interpretation
Ghost hierarchy
Every Boo of every sub species is under the reign of the current King Boo, William.
Ranked under him exist more Boo royalty, each having a ruler for each sub type:
◆King William reigns over regular Boos specifically as well as Boos in general
◆King Keith reigns over Dark Boos
◆Queen Isabella reigns over Bomb Boos
◆King Marcello reigns over the Boos of Isla Delfino (specifically of Lido Sirena), which, while looking different from regular Boos, show the exact same range of power and magical abilities.
Under the rulers follow their families which by proxy are rather powerful.
And lastly the normal Boos themselves.
(There is also the stand-in king for William called Vincenzo but he is just as powerful as regular Boos and only visually a king.)