Nintendo's handheld dual-screen video game systems support a huge library of titles, many of which feature cheat codes. In order to use cheats for your Nintendo DS games like Lego Batman and New Super Mario Brothers, you'll need to familiarize yourself with the system's buttons and their abbreviations.

Nintendo DS systems are well labeled. However, there is sometimes confusion about the top left and top right shoulder buttons on the system when it comes to cheat codes.

For example, if a cheat guide tells you to press "L," you might assume that means you should press "Left" on the directional pad. More often than not, L refers to the left shoulder button.

The image above shows the Nintendo DSi model, but the controls for the original DS, DS Lite, and DSi are identical. Use the following key to determine which buttons to press when entering a cheat: