At the game menu, pick the second option from the second row. Then select the 1st option, choose 0000 and highlight "Yes" (first option). On controller 2, hold Left-Down + B and on controller 1, press A. If done right, the gold mines counter will increase to 100.
When the word "END" is displayed on-screen after the end of the game, press and hold A + B + Select + Start on controller 1 and A + B on controller 2 at the same time.
Go to the merchant and tap select 10 times, the screen should blink twice to confirm. You will recieve 10 free lancers.
At the game menu, select "Mi", then "Enlist", select 1 and highlight "No". Now, on controller 2, hold Down + A and press A on controller 1. You should hear a faint sound confirming the entry. Now, while still holding the buttons on controller 2, hold at the same time Up + B + Start on controller 1. Release the controller 2 buttons and the word "Which" will appear. Release the controller 1 buttons and the numbers "01" will appear. The numbers are the same numbers of the countries in the game. Just select 01 to start with the default country and everything maximized.
On controller 1, hold Select + Start and Power on or Reset the console. Release the buttons and on controller 2, hold A + B + Right. The soundtest will appear after the HOT-B logo.
Hold Select and Start, then reset the console. At the Hot-B logo, press the following buttons for the named effects. (Note: Most NES controllers will not let you press Left + Right at the same time; you will need a specially-modified one.)