First of all, I found many different fc Goldfinger codes on the Internet and put them in the code folder. Then press the note key in the game to pop up the menu, select the second code list to enter, and then open the code, and many lines will appear. Each line will indicate the function. After selecting a function, there will be several options for you to choose, but they are basically locked or enabled, and then you can use them.

However, it should be noted that for hp, invincible, etc., it is best to choose the full lock state. (It should be noted that sometimes some locks will cause crashes, such as hp and mp locks in Dream Star 2, but Dream Star 2 can use invincible locks), and all weapons should be fully enabled, fully illustrated, with maximum money and maximum hp ceiling.