Phoenix Wright: Ace Attorney Phantom Hourglass Pokemon Diamond/Pearl Animal Crossing (I was literally hooked on this game for a year) Super Mario 64 DS (Port of one of the best games ever)
My favourite DS games are: 1. New Super Mario Bros. 2. Mario Kart 3. Mario and Luigi: Partners in Time 4. Zelda and the Phantom Hourglass 5. FIFA 2009 (Just to be different)