Horror Hat II and Treat Staff II here, took some time but I got both..
I bought some cheap cookies, gobby chocolate, bubble chocolate and some pies
Trade Sweets 1x Each , each Vana day-
Tradeing with No Equipment will get you = Trick Staff, Trick Staff II, Pumpkin Hat, Pumpkin Hat II
Tradeing with Trick Staff II and Pumpkin Hat II equiped will get ya = Horror Hat II or Treat Staff II
this is ofcourse after all the danm costumes, you have to have pumpkin hat II and trick staff II equiped if you want the Horror or Treat thingy
also you could equip pumpkin hat 1, or trick staff 1.. to get horror hat 1 and treat staff 1.. but I wouldnt, since both of those itms really dont have any good Enhancements.
.. Welp I hope I help somebody out ~Wacky