Here is the full list of all 20 Spooky Dwellers - there are Collector's Edition achievements.
Reach the CE ending
Complete all the Match 3 levels
Get 150 Gold Cups
Reach the standard ending
Get 90 Gold Cups
Complete all the Hidden Objects minigames
Complete all the Table of Memory minigames
Activate a card to trap Mr. Pumpkin
Buy all the items for the Terrace
Get a "Perfect" in all the Coin Collector levels
Complete all the Coin Collector minigames
Complete all the Swap Puzzles minigames
Get 60 Gold Cups
Complete 35 Match 3 levels
Complete all the Higher or Lower minigames
Get a "Perfect" Coin Collector level
Get 25 Gold Cups
Complete 10 Match 3 levels
Get 5 Gold Cups
Get your first Gold Cup