Plugin request password or passcode

Hi im unsure if anyone may be able to help or not but im trying to figure out some way of letting the player get gold or maybe an item or something from entering a password or pass code into the game kind of like the cheat system used in old school games 

no need for a plugin


this was written for Ace but functions the same in MV:


http://blog.rpgmakerweb.com/tutorials/password-input-using-actor-names/