First, connect an extra joystick in the Famicom's expansion port. Now, hold Up on controller 1 + Down on the extra joystick, press Select to highlight Continue and then press Start. If done right, you'll start the game with 99 Tech.
Enter the Japanese syllables below as a password to enable debugging.
At the password screen, enter the following Japanese characters. Format is Row Number, Column Number.- 1,10 - 3,2 - 5,5 - 4,2 - - 4,1 - 4,3 - 1,5 - 5,4 - - 2,2 - 4,3 - 2,7 - 2,3 - - 4,2 - 1,2 - 1,4 - 2,3 - - 4,2 - 2,1 - 2,2 - 4,4 - - 5,3 - 5,2 - 1,1 - 2,7 - - 1,5 - 4,4 - 2,4 - 2,3 - - 4,1 - 1,4 - 1,1 -
While text is being displayed on the screen, hold Up to increase the speed or Down to decrease it.