DS Tutorials
If you have a R4 Card you can change the theme of the menu.
Once you have selected the game cartridge slot and see the first menu, PRESS START. This will bring up a another menu. Select SETTINGS. This will bring up the System Settings. The first option "User Interface Style" will allow you to select a different theme. Select the theme you want and press A. These themes are not created by us and I cannot verify usability. If you have any troubles please message us.
If you have a 3DS that we have modded, check out this page. I have more in depth tutorials on what apps to use, how and where to get custom themes, and other tips.