Now the truth about the king.
My opinion and I think they revealed it in kingdoms. The king is Santa.
[Ok. That's not scary....hmmm...what now? A pokepasta...nah most ideas there were already done. I know.] Bonus pasta. Everyone knows the heroic Mario but how were the Boos made?
1.They're dead Mario allies and villains.
2.They are failed Bowser experiments.
3.They are koopas and goombas.