The Last Ninja

Level select:
Start a new game. Go up to the door, then punch the white button on it. Return to the start and fall down the hole. Get the key and exit the building. Ignore the gate and follow the bottom left road and collect the shurikens. Return to the gate and open it with the key. Note: Having all your lives and shurikens is important. Enable the shurikens on the next screen with the river and a boat. Stand directly below the big bush. You must be at the top edge between the gray and green floor where you cannot go any further. Position your character between the middle and right part of the bush. If in the correct location, your character's head should almost be touching the top of the screen. Face the tree and two small bushes at the upper left and throw your shurikens. The shurikens should pass between the middle and top part of the right bush if aimed correctly. When you have one shurilen remaining, a sound should confirm correct code entry. Note: If the sound is not played, restart and try again. Walk left to the river and kill yourself six times. The message "Isn't that lucky" and the instructions to skip levels will appear after the "Game Over" screen. Start a new game then press Select to skip levels or the A + B buttons to change screens.

Final battle:
Enter 550446503776HC6 as a password.

Fifteen lives:
Enter HHHHHHHHHHH0HHH as a password.

Hint: The final battle:
Enter the combination obtained from the computer earlier in the game. Then light all of the candles before quickly killing the opponent in the center of the screen before he extinguishes the candles.