PictoChat allows users to communicate with other Nintendo DS users within local wireless range. Users can enter text (via a small on screen keyboard), handwrite messages or draw pictures (via the stylus and touchscreen). There are four chatrooms (A, B, C, D) in which people can go to chat. Up to sixteen people can connect in any one room.
On Nintendo DS and Nintendo DS Lite systems users can only write messages in black. However, the DSi and DSi XL includes a new function, letting users write in either black or rainbow colored pen.