First, rescue the other two players and finish the
game. While you are at the end of the credits, the phrase "You've got a special
key" will appear. After that, save the game. Start the game that you
just saved. Enter the room with the large mirror on the 2nd floor of the
mansion. Unlock the door on the back, then enter the closet and move to the
end of the clothes. A phrase will then appear, say yes and you have the
clothes.
