Mascot Costumes from Fierce Costumes - Choose from our large selection of all types and styles of Adult costumes. Our most popular mascot costumes are our Easter Bunny Costume, Black Gorilla Costume, Blue Gorilla Costume and Purple Gorilla Costume. In our Unisex Costume category you will find costumes that will fit most adults . Here at FierceCostumes.com we are dedicated to making Costumer Satisfaction our number one priority, and are certain you will find a great costume, to make your Halloween fun and memorable.