Ninja Gaiden (忍者外伝)

Mode Select

Hold ++ on controller 2 and then hold ++ on controller 1 until the Mode Select screen appears. You can select the starting round, number of lives, "Ninjyutu mode" (infinite magic), invincibility and a sound test.

Infinite Ninja Magic

Wait until you've collected 999 N points before using any ninja magic.

Action Replay codes

00DFC814

Infinite energy

00DFC704

Infinite lives (keeps showing 2 after dying for the first time)

00DFC3E7

Infinite weapons

00DFB106

Infinite time (keeps showing 245)

See the main page for Ninja Gaiden (忍者外伝)