Devil Halloween Costumes: A Devil Costume from Smiffys makes it easy to be bad! One of the most popular Halloween costumes. In addition to our ever-expanding range of devil costumes, we also have a range of flirty Fever Wicked Devil and Curves Devil costumes that can make you look both naughty and nice at the same time. Our all-in-one Devil Costume and Devil Kit with Wings and Horns are great for a low cost, low effort but high impact Halloween costume. Don’t forget to finish off your fiery look with a trident from our accessories range and the Devil Character Makeup Kit. Devils are the ultimate Horror symbol, and are associated with evil and death. We all have a Devil inside of us, depending on whether we’re naughty or nice.