Diary Girl turns the DS into a PDA and lets handheld gamers keep track of their daily activities and password protect their secrets. Users can customize and dress their avatars and then use the journal function to record secrets, schedule social gatherings, and remember friends' contact information, birthdays, and personal likes and dislikes. Friends can hook up and chat in real-time via nintendo Wi-Fi Connection, and those looking for some fun can play mini-games that include matching, jig-saw puzzles, horoscopes, and personality quizzes.