I have the following games:

Animal Crossing: Wild World
Brain Age: Train Your Brain in Minutes
Contact
Cooking Mama
Elite Beat Agent (Recommend)
Hotel Dusk: Room 215 (Recommend)
Mario & Luigi: Partners in Time
Mario Kart DS
New Super Mario Bros. (Recommend)
Nintendogs: Chihuahua & Friends
Pac-Pix
Phoenix Wright: Ace Attorney (Recommend)
Phoenix Wright: Ace Attorney: Justice For All (actually Gyakuten Saiban 2) (Recommend)
Star Fox Command
Tao's Adventure (I hate this game so much)
Tetris DS
WarioWare: Touched!