Treasure sword:
When entering Bron, go to the house with a dart board on the side. Go up the stairs and talk to the man behind the counter. Tell him you want to play and answer: make a wish, slow, first prize . It may take a few attempts, but you will get it. You can get lots of swords and sell them for 1900 Rozes each.
Attributes:
Attack magic has a property called “attributes”. Its relationship to the enemy’s attribute can significantly alter the damage that a spell deals. If your magic has the opposing attribute to your enemy’s attribute, the damage will increase, whereas if the attributes are the same it will decrease. A monster with the fire attribute will be weak against water magic, but strong against fire magic. A monster with the water attribute will be weak against fire magic, but strong against water magic. A moister with the earth attribute will be weak against wind magic, but strong against the earth magic. A monster with the wind attribute will be weak against the earth magic, but strong against the wind magic.
Bonus characters (Japanese version):
Have a cleared saved game file from Eiyuu Densetsu 3: Shiroki Majo on your memory stick. Load the file when prompted to unlock characters from that game.