After you have collected all the ? shards and beaten the first bonus dungeon you can enter the second bonus dungeon. At the very end of the dungeon you can fight god if you beat him in 2o turns he will grant you a wish after you have got them all beat him in 15 turns. Then ask him to join your village then he will. Too see him go to your village and look in the tower at the upper conner (you can also battle him in your town).