When and where is the Costume Contest presented by whom? FAN EXPO HQ September 19, 2017 17:21 Follow This fan favorite event has reached new heights! This year’s event will take place in Ballroom C on Saturday at 5PM EST. Related articles What are the Costume Contest entry rules? How do I enter the Costume Contest? My MegaCon Tampa Bay tickets were gifted to me; do I need to change the name on the e-ticket? Can I take a photo of/with (guest name) with my own camera at MegaCon Tampa Bay? What is the Costume Contest? Comments 0 comments Article is closed for comments.