The Playstation 3 version of the game added a new set of costumes for everyone, putting them in the outfits of characters from other Tales games. These are unlocked by either beating the game and starting a New Game Plus file, or having save data from Tales of Graces f and/or Tales of Xillia. These are are:

Lloyd: Guy Cecil from Tales of the Abyss
Genis: Luke fon Fabre from Tales of the Abyss
Colette: Rita Mordio from Tales of Vesperia
Raine: Pascal from Tales of Graces
Sheena: Judith from Tales of Vesperia
Zelos: Alvin from Tales of Xillia
Regal: Malik Caesar from Tales of Graces
Presea: Elize Lutus from Tales of Xillia
Kratos: Ludger Will Kresnik from Tales of Xillia 2