You have your own secret message on your DS system. You can read other peoples secret messages when you are chatting with them. To do this, first link up with someone in any chatroom and in the top right corner, slightly left of the close symbol, you will see the name(s) of the person/people you are chatting with. Tap these with the stylus or you finger and their secret message will appear on te screen. It would be funny to type in the persons secret message and send it to them!