What's a long good DS game?

[Hejira]

*I* would have been dissuaded. I'm not exactly in the best of financial situations AND I have an SP, which already takes care of my backwards-compatibility needs (which is...Pokémon Silver and....that's it.)

New adopters of the DS would, AFAICS, not be terribly interested in using something with a touch screen, microphone, two screens, and a nice greeting chime that changes on your birthday to play monochrome Tetris.