I know that we need to type PrincessHeart in order to unlock the costume, but what do we have to do to get the game to tell you the code? When I beat the game on the first playthrough, it told that HappyBirthDay was the code for the Heather Shirt during the Game Results screen. What are the requirements in the game for it to tell me that PrincessHeart is also a code?
I got the PrincessHeart after completing an extra new game. So PostCode is right.