Then again, I could be wrong. The wording behind the description's tricky, so it could pretty much either mean DQ appearing for the first time on the DS, a particular DQ game appearing on the DS for the first time or just a brand new one appearing on the DS.
So it's guaranteed to be either IV, VI or IX. I'm betting either IV or IX.
Edit: Yep. It's DQIV. $11.99 is not a bad price for it. Shame SE decided to cut corners and told the translation group to not bother touching the party chat and axe it.