C3PX said:

So I have a DS, but I don't have many games for it. Any recomendation on must have games for the DS?

Stuff I Own and recommend

Mario and Luigi: Partners in Time
Mario 64 DS
Legend of Zelda: Phantom Hourglass
Advance Wars: Dual Strike
Castlevania: Dawn of Sorrow
Castlevania: Portrait of Ruin
Phoenix Wright: Ace Attorney (Series)
Apollo Justice: Ace Attorney
Kirby's Canvas Curse
Meteos
Pokemon Diamond/Pearl
Mario Kart DS

Stuff I've Heard Good Things About

Yoshi's Island DS
Advance Wars: Day of Ruin
Elite Beat Agents
The World Ends With You
Hotel Dusk: Room 215
Picross DS
Ninja Gaiden: Dragon Sword
Sonic Rush