Nintendo 3DS tag mode explained Share data with other 3DS owners Okay, so the Nintendo 3DS ships with a tag mode that is more advanced than in current DS games. It allows you to swap data such as highscores, ghost data and miis with other 3DS users while the 3DS is in sleep mode. You do not have to be in a game on the 3DS to swap data. Data for all your games that allow tag mode will be swapped with passers-by. Here's how it works: When you comes into contact with other 3DS owners your system will automatically send your mii character and other game data to that person. When you receive data a special light on the top right of the 3DS will start flashing (like the blue light on the Wii). On the main menu of the 3DS there is a special button for tag mode on the top of the screen. All your tag mode data will be shown there. You will be greeted with a list of the data that has been shared. Each game will have its own section. The top screen will display a profile of the person you came in contact with and what game you shared data for. You will also be able to see a mii parade of other people's miis holding the game icon for the game you shared data for. You will be able to go in-game to access the data. Some examples that have been given include seeing other mii characters on walks with their pets in Nintendogs + Cats and using ghost data to automatically fight random passers-by in Super Street Fighter 3D Edition. When you get home and check the data you will be able to see how many people you beat or lost to while you were out walking.