"Different costumes" refers to a variety of outfits or clothing worn by people to portray different characters or roles in a specific context or event. Full definition
Use your imagination and dress your character in different costumes, then decorate the card choosing a background, music and lots of stickers. (gamergeddon.com)
Are there going to be different costumes for different versions of the same character? (nintendowire.com)
The focus was on a variety of different costumes you can equip which will give you different abilities. (snackbar-games.com)