checked-no =>Stage Practice: On the title screen, hold <A>+<B>+<C> and press <START>. You'll be able to practice in any stage without a boss. =>Unlimited Shurikens: Enter the Options menu and set the number of shurikens to 00. Wait for a moment or two on this screen and 00 will turn into the infinity symbol. =>Hidden Shuriken Bonus: If you end a stage with 11 times more shurikens than lives, you'll receive a 30,000 point bonus. =>Easy Lives Trick: In 4-2, attack the base of the first conveyor belt you find and a symbol will appear. Hop onto the conveyor belt and let it carry you off until you die. Even though you die, you'll gain two lives. Repeat as many times as you wish to build up your reserve of extra lives.