Here are some cheats and tips for the game Shinobi Legions.
999 Shurikens:
At the Start/Options screen, select “Options.” In the Options menu,
move the cursor to “Shurikens.” Simultaneously hold L and R, then
press C, A, and B.
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Level select:
Start a game and pause it. Then press A, B, A, B, C. Two numbers will
appear in the lower left corner. Now you can go to any stage in the
game.
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One-hit Wonder mode:
At the title screen, put the cursor on Game Start and press A, B, C,
B, A, Start. You’ll have no lives, and one hit will kill you.