Suikoden series ("Tierkreis" is German for "Zodiac"). The name showed up in a trademark registration recently, but the platform was unknown until now. Take that, other platforms, we've got this one!
This game uses a similar look to the Final Fantasy remakes: chibi-ish 3D characters on lovely, detailed backgrounds. The story is wildly different from other Suikodens, starting as the assembled crew of 108 heroes is already in combat with the villain, and all but four are defeated. Your job is to gather the group again.
As if Dragon Quest IX didn't already seal the deal, it seems fairly clear that the DS is the platform for RPGs this generation.