My essentials:
Chrono Trigger
The World Ends With You
Front Mission
Final Fantasy Tactics A2
Dragon Quest 4
Dragon Quest 5
Soma Bringer
Pokemon Platinum
Grand Theft Auto: China Town Wars
Final Fantasy 3
Mario & Luigi - Partners in Time
Animal Crossing - Wild World
Castlevania - Dawn of Sorrow
Henry Hatsworth
Metal Slug 7
Space Invaders Extreme
Any Phoenix Wright games
Meteos
Super Mario 64 DS
Final Fantasy 12: Revenant Wings
Mario Kart DS
Disgaea: Hour of Darkness
Valkyrie Profile: Covenant of the Plume
Hmm, that's all I can think of at the moment.