Be Hu Man at start of game
Enter NODEGOSOOOOOOO as a password. Note: Enter MODE FOR OOOO OOO in Japanese version of the game.
Secret Weapons Store
Enter the house with a well in the first village. Fall down the well, and turn left towards the exit door. Place your character on that door, jump directly up, then hold Up while in mid-air. Enter the hidden door that appears above the exit door.
Be Hu Man at start of game...