Dr. Usha's research center password:
X, X, Triangle, Circle, Square.
First Make sure you're at least at level 52 each then head to the top of Mt. Dhini and walk around where the wings are and you'll run Into A monster more powerful The the final stage of Cort, Its Name Is Lapis and It has about 70,000 Hp and don't rely on Magic because it'll suck it up at the beginning of the battle. Once you defeat him he'll give you the Evil Medallion, One of the Rarest and most valuable Items in the game.
(supplied by: John)