I know that you can get the costumes by following these steps
Tina- beat the game with her on legend mode without a continue (Ultra Hard)
Christie-beat the game with Christie on legend time attack mode without a coninue on (Ultra Hard)
Lisa- beat the game with Lisa on legend survival (Ultra Hard)
but has anybody have a hard time with this I know I am and this is insane and is there another way of getting these in game costumes?