Enter a chat room on the date that you entered as your birthday in the system settings. The message "Happy Birthday! Today is (your name's) birthday!" will appear.

Hold L then press R to make it scroll slower. This can be used for animations. It also works backwards.

Turn on your DS on christmas day, and open Pictochat. You will be greeted with a Merry Christmas message.

Enter a chat room on January 1st.

There are currently six versions of DS firmware. To find out which one you have, insert a game in your DS and enter Pictochat Room A. Remove your game cartridge, and the screen will briefly turn into a specific color. The color corresponds to the version of DS firmware you have on your DS.

Version 1 - DS will freeze (no color)
Version 2 - Blue-Gray
Version 3 - Green
Version 4 - Yellow
Version 5 - Pink
Version 6 - Dark Blue