For Nintendo 3DS, Sleep Mode can be used for the StreetPass feature.
Some Nintendo DS games feature sound effects for when the system is opened or closed (resuming or activating Sleep Mode). The game/console can be resumed later by pressing L+R+Select (Game Boy Advance), opening the lid (Nintendo DS and 3DS), adjusting the slider (Nintendo 2DS), or pressing the power button/home button (Nintendo Switch). For the Nintendo Switch, the console may also eventually enter Sleep Mode if no input is left by the player. It can be activated via an in-game menu (Game Boy Advance), closing the lid (Nintendo DS and 3DS), adjusting a sleep mode slider ( Nintendo 2DS), or pressing the power button but not holding it down fully (Nintendo Switch). Sleep Mode causes the game to temporarily suspend preserving some of the console's battery life. It was later built in to the Nintendo DS, Nintendo 3DS and Nintendo Switch families of consoles themselves. Sleep Mode is a feature introduced in a few Game Boy Advance games, such as Super Mario Advance 4: Super Mario Bros.
