I have read in several places (including the instruction booklet) how to unlock hidden characters. It involves pressing the X and B buttons in certain sequences while selecting certain characters. I have also read that you unlock a card game from the options menu by beating the game. I cannot seem to do any of this. I have beaten the game several times and have not gotten a card game. Also when trying to press X and Y while selecting characters, I am exited from the selection screen back to the main menu after pressing B. In which modes can this be done? (Story, Versus, Training, and Time-Attack?)