Getsufuu Maden Cheats

Press A & B at the same time during the intro to skip it and start the game right away. It can also be done in the password screen.

The passwords are in Japanese, so due to the difficulty of writing Japanese literally or phonetically I'll just write down the positions of each letter on each of the 3 rows, from left to right.Second row, 3rd letter.
Third row, last letter.
Second row, 12th letter.
Third row, 9th letter.
First row, last letter.
Second row, 9th letter.
First row, 3rd letter.
Second row, 7th letter.Second row, 7th letter.
Second row, last letter.
First row, 4th letter.
Second row, 8th letter.
First row, 6th letter.
Second row, 2nd letter.
First row, 2nd letter.
Third row, 10th letter.

At the password screen, press Right 4 times and enter the Japanese character. Down 2 times, Right 7 times and enter the Japanese character. Left 4 times and enter the Japanese character. Right 5 times and enter the Japanese character. Up 1 time, Right 3 times and enter the Japanese character. Up 1 time and enter the Japanese character. Right 2 times, Up 1 time and enter the Japanese character. Right 3 times, Down 1 time and enter the Japanese character. Up 1 time and enter the Japanese character. Down 2 times, Right 7 times and enter the Japanese character. Left 4 times and enter the Japanese character. Right 5 times and enter the Japanese character. Up 1 time, Right 3 times and enter the Japanese character. Up 1 time and enter the Japanese character. Right 2 times, Up 1 time and enter the Japanese character. Right 3 times, Down 1 time and enter the Japanese character. Now press Select and you'll see the ending sequence.