How to get
First available during the Halloween event 2015 (Oct 20th - Nov 2nd), purchased with Candy Corn.
Available again during the Halloween event 2016, purchased with Pumpkins. It remains available at the Bazaar for those who still have pumpkins in stock.
Now available at Ghost Ship Cove on the second trade panel, purchased with Doubloons (rotating cycle with other Halloween decorations).