The New Popropica Where Do You Get The Idems For Popropica Halloween Thing ? Plz Plz Help !?

Where do you get the idems for popropica halloween thing ? plz plz help !? - the new popropica

I found the key, cup, and poses for nothing! But the cat gost said there are 4, which I did, 3 IDEM plz plz help!