Royal Order Of The Holy Poop.
That's better.
You mean: The Royal Order of the Holy Mackerel was never mentioned. Up until almost the end of Gravity Falls.
Diddo. The only refrence is the banner.
In one of the Gravity Falls web games, there is a banner that when you hover over it, says, "The Royal Order of the Holy Mackeral"
Its also a youtube channel
The More You Know!
WELP.
so its not real.