We’ve gathered some of the best of these costumes to show off below. Some of the cosplay costumes have been rated by other customers who have bought the products. Continue reading How to Keep Cosplay Costumes Look New? First, the 501st legion – a nationwide Star Wars cosplay organization – teamed up for an epic Dragon Con parade march. The 501st Legion is famous not just for their film-accurate Star Wars costumes, but also for visiting hospitals and other events, and raising charity.