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This is a list of accessories for the Nintendo DS.
Accessories for the Nintendo DS often came in two forms: those that worked with Slot 1 as a regular DS cartridge, and those that worked in Slot 2 (for Game Boy Advance cartridges) known as a "DS Option Pak" when inserted in the DS or DS Lite system's main menu. When inserted, the GBA slot option on the DS menu will show the text "There is a DS Option Pak inserted", with the exception of any DS/GBA connectivity accessories such as Boktai Solar Sensors and Lunar Knights.
Nintendo has emphasized that its primary intention for the inclusion of a GBA cartridge slot was to allow a wide variety of accessories to be released for the system, the Game Boy Advance compatibility titles being a logical extension.
As the Nintendo DSi and later models lack a GBA slot, Option Paks are not compatible with it, rendering certain games unplayable.

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