If you neglect to buy a sturdy Nintendo DS case, you're putting your favorite gaming device at risk. Like all electronic devices, the DS is easy to get damaged. If that happens, your device could be out of commission for weeks while you find someone to repair it. The hard outer shell of a cheap Nintendo DS case will protect your device from harm if it's ever dropped. They also come in a variety of colors and designs. The best Nintendo DS cases come with a carabiner so you can securely fasten it to your belt when it's time to get moving.