Speaking of the Chateau, HOW exactly do you become Grand Duke/Duchess? Serebii is incredibly vague with their "Defeat all trainers in the chateau"
https://www.serebii.net/xy/battlechateau.shtml because I have beaten all the active trainers in the chateau multiple times per day for multiple days so I kinda need a little more information than that. And I don't think I missed any rooms, there's the main reception hall, the two rooms inside that, the smaller hallway that loops around with the other room inside that, so isn't that all the places in the chateau?
EDIT: So upon further checking, it appears as though Gold, Silver AND Red Writs can all stack with each other:
https://www.gamefaqs.com/boards/696959-pokemon-x/67601830 so does that mean the Writ of Invitation would stack too? or does the Silver/Gold writ already do what Writ of Invitation does and it would then be redundant?