Enter "NARPAS SWORD0 000000 000000" as a
password. This allows you to start with
everything and invincibility. The Bosses are not
defeated, and you can play the game normally,
All Tanks, And Pick-ups (Not Infinite)
This is on the basis that "Metroid" has already
been unlocked. Go to "Options" on the main page.
Select "Original Metroid", and press Start when
the title screen comes up. Press select, and then
Start. Type "JUSTIN BAILEY ------ ------". Note:
Do not use the numbers, and you can't type the
apostrophes, don't worry about spacing: it's
every six spaces. Type the dashes which is
located in the bottom right.
When done, press start, and you will begin in
Norfair, on the Elevator, with a suit-less Samus,
with Wave Beam, 255 Missiles, and 30 energy
units. You have all the tanks, and pick-ups, but
it is not infinite.