I have downloaded all the first 3200 games ever released for the machine already.
that seems rather a waste of hard drive space seeing as about 95% of everything released for the ds is literally garbage, but there are some very nice gems among the remaining 5%
everything is "my littlest pet shop", "my pet vet", "my adorable bunny friend", "my dog dog dog", "dog doggie simulator dog", "DOGZ", "DOGZ II", "DOGZ III" and so on, and if it's not that, it is "train your brain: brain train II", "brain training: sudoku mania!", "train brain", "brain brain brainiac", "training brain: brain training" and so forth
here are some more tips to try out though:
HOTEL DUSK: ROOM 215 (!!!)
dragon quest heroes: rocket slime
dragon quest iv: chapters of the chosen
final fantasy iii
elite beat agents
kirby canvas curse
super princess peach
mario & luigi: partners in time
warioware: touched
but honestly the only reason i even keep my ds is the next phoenix wright game because
honestly