Instructions
Press the power button on your DSi and wait for the main menu to appear.
Select the Nintendo DSi camera icon from the main menu, and then click on "Camera" on the left-hand side of the screen.
View the 11 lenses that pop up, and choose the one you want by pressing on it with your stylus. Some of the lenses include mirror, graffiti, mischief and resemblance.
Tap the "Start" button with your stylus.
Aim the front or back camera at the item you want to take a picture of. Click "Capture" to take the picture.