Sweet. Vagabond is now a proud owner of a DS lite.

[Madanial]

Etrian Odyssey 1&2(but i think it'll be so hard to find a new copy now ,even used one.)
Pokemon Platinum
Rune Factory 1&2(feel free to take months to get all girls.) XD
Phoenix Wright series(made my head exploded.)
Ryhthm Paradise(crazy game ,crazy fun.)
Retro Game Challange(ah ,old days...)
Dokapon Journey(10 times better when play with friends.)
Touch Detective 1&2
Advance Wars series

And more ,DS really got enormous library of epic game. :D