Final Fantasy: Crystal Chronicles -- Echoes of Time Nintendo Wii

The hero sets of into the dark forest surrounding the village, battling the hordes of monsters that lurk there. Finally, after defeating the last mighty beast, the hero steps into a clearing in the forest. A beautiful crystal cloats in midair, and sitting on top of it is Sherlotta. She accounces the good news - the hero has passed the test. After a graduation present, Sherlotta presents the hero with a crystal. But before the villagers have a chance to celebrate the happy event, a young village girl falls gravely ill.

The village has a Law, and that Law says that no villager may leave the forest for the outside world. But the young girl needs a curse, so the hero is sent out of the forest for the first time ever to seek medicine in the great world beyond. There, the hero learns that the young girl's disease is an ancient one, and is caused by crystals that have long since disappeared from the world. Or have they?