Leave it to homebrew superstar Mollusk to add some life to the number puzzle. As its name implies, Skinz Sudoku allows you to customize almost every visual detail of its interface. Dropping a PNG template into the game's included PAFS.bat file spits out a unique Skinz Sudoku ROM with your graphics. Jump past the post break for some examples of the different themes.
Think of the possibilities! Design your screens with lightning bolts! Replace all of the numbers with Pokémon heads! Scan in a photo of your secret crush with a word balloon that says, "I luv u! Plz date me!" Just don't let anyone catch you locking lips with your DS after staring into his or her eyes for too long. Seriously guys, that's weird.