Unlimited Items:
To obtain an unlimited number of items, approach an item and before continuously tapping T before pressing Space.
Unlimited Keys:
Entering a dungeon or cave and save the game. Move through your location until you run out of keys. Restore the game to resume with the doors remaining open and a new set of keys.
Unlimited Bravery Points:
Jump on the turtle and continue to attack it.
Increased Luck:
To increase your luck to 65 first locate the Sorceress on the island with the Crystal Castle. Then use the "Ask" command several times and you will gain luck.