Cartoons
If you are into anime, consider an anime-inspired NDS theme. On the NDSThemes website, there is a bevvy of anime-themed skins to feed the "otaku" or anime lover inside you. However, if you like cartoons, but not anime, there is also a list of cartoon-themed downloads available on the site featuring characters like Tinkerbell, Minnie Mouse, The Simpsons and Hello Kitty.
Music
If you're a music lover, why not use pictures of your favorite singers or bands as your theme? NDSThemes has themes and skins featuring artists from a variety of musical genres, from famous pop icons such as Michael Jackson, Britney Spears and Lady Gaga to rappers like Lil Wayne and Ludacris.
Make Your Own
Every day, people like yourself create cool Nintendo DS skins and themes and share them with other DS emulator enthusiasts. These skins and themes range from average in appearance to breathtaking. If you want to express your uniqueness and creativity by designing you own skin, you can download a skin maker from File Trip or NDS Emulator. Once you think you have designed an excellent skin, don't keep it to yourself: Share it with other NDS emulator users.
Macrophotography Pics
If you have decided to make your own NDS skins and themes, a really good idea for a theme background is a macrophotography picture. Macrophotography images are extremely close-up photos that capture things that you can't see with the naked eye. Even photos of the simplest things such as droplets of water, insects and flower pollen are too captivating for words.