Make the Nintendo DS Play Gameboy Advance Games

Got any old Game Boy Advance games lying around? Well with a Nintendo DS, or DS Lite, you can play them!

Steps

Remove any game cartridge from the device.
Push the power slider on the right side of your DS and wait for the DS to power on.
Touch the small DS symbol at the bottom of your touchscreen and then the purple wrench.
- A small picture of a GBA will appear, click this and set which screen (top or bottom) you would like to play on.
Proceed to your start up settings for your DS. these will be contained under the purple settings section with a purple picture with an arrow and a rectangle.
- Select Manual Mode. This is important, if set on Auto Mode the DS will always play any DS or GBA game inserted into the device first.
- The device will then ask to be powered off, do not manually power off the device using the slider on the side. Just either touch Yes on the touchscreen or press the A button.
Insert your Game Boy Advance cartridge on the bottom slot of your DS. This is labeled for you next to the slot as Slot-2.
Touch, or select the bottom box on your touch screen that says "Start GBA game". If this option does not show up then you must power off the device and remove the cartridge. Reinsert and attempt this step again.
Enjoy playing your classic Game Boy Advance games!

Alternatively, you can just remove any DS game inserted, and leave the GBA cartridge. The device will read the GBA cartridge automatically and start up upon power up.
This will not work on a DSi, DSi XL, 3DS, 3DS XL, or 2DS as Slot-2 isn't provided with those devices.

Do not remove a cartridge while the device is still powered on.
Do not attempt to disassemble your Game Boy Advance cartridge. You will not only void the warranty, but you will also have the risk of breaking your cartridge.
Do not blow into the device slots, or the cartridges themselves, the moisture contained within your breath may ruin the devices.