Who's That Ghoul? is a game released on the Monster High website on March 13, 2014. It promotes the Frights, Camera, Action! line, utilizing screenshots from "Frights, Camera, Action!" as half of its content.
The objective of the game is to complete five puzzles in as short an amount of time as possible by inserting the given pieces in their proper places. Each correctly placed piece is worth 25 points and there are no penalties for placing a piece wrong but for loss of the time spent on moving the piece. The timer present hands out bonus points for each puzzle completed before it is drained. At maximum, it grants one hundred points and it grants five points less for every second spent. In other words, a puzzle has to be completed within twenty seconds to earn any bonus points.
There are two difficulty modes to choose from: Easy and Scary Hard. In the easy mode, the puzzle pieces stand still and all of them have to be placed in the puzzle. The first puzzle requires three pieces to be placed and adds two more for each next puzzle, meaning from puzzle 1-2-3-4-5 the amount of pieces to place is 3-5-7-9-11. In scary hard mode, the pieces spin around and there are a few among them that don't belong in the puzzle. The first puzzle requires six pieces to be placed and adds two more for each next puzzle, meaning from puzzle 1-2-3-4-5 the amount of pieces to place is 6-8-10-12-14.
The hint system present allows users to get a glimpse at the full picture to see how it should look. The hint can be activated at any time and comes without any costs.