IK I TOLD MY DAD(he saw both shows but only 1 season of gravity falls)

This means bill to some degree is aware of the boiling Islas , enough to know papa titan and hooty , who are both technically connected with hooty being one of papa titan’s parasites .. so .. he might know king

Hooty is everywhere

I found that too

Know who else is in the book of bill?

IT'S THE FREAKIN CORE