We've said it before, and we're happy to say it again and again: Swarovski crystals are for suckers. The only way to really customize a DS Lite, especially if you live in South Korea, is to add metallic accents in 24k gold.
A Korean outfit called Design Complex sells a kit with decals made of the precious metal or, for blingers on a budget, nickel. The stickers are designed specifically to detail the areas around the screen and buttons of the Nintendo handheld, according to Technabob, and an entire set goes for only $29. That's hundreds of dollars less than Paris Hilton's version, by the way, though you don't get the yap-dog.