Metroid: Zero Mission

All Zero Mission Endings
To unlock the different game endings, fulfil these requirements:
Samus in a blue jumpsuit: Complete the game in under two hours on Normal or Hard with more than 15%.

Samus in shorts, at a bar: Complete the game in under two hours on Normal with 100%.

Samus in shorts, in a city: Complete the game in over two hours on Normal or Hard with 100%.

Samus in shorts, looking out a window: Complete the game on Normal with less than 15%.

Samus in shorts, looking over a city: Complete the game in under two hours on Hard with 100%.

Samus on a rock: Complete the game on Easy, or complete the game in over four hours in Normal or Hard with more than 15%.

Samus without her helmet and armor: Complete the game on Hard with less than 15%.

Samus without her helmet, looking at a sunset: Complete the game in three hours on Normal or Hard with more than 15%.
(Thanks to spidey1987@hotmail.com)

Unlock Original NES Metroid
Complete one run through Metroid: Zero Mission.
(Thanks to spidey1987@hotmail.com)

Unlock Original NES Metroid Effects
Best ending with no suit:
X----- --N?WO dV-Gm9 W01GMI

Debug Mode:
BOMBS_ MISSLE SCREW_ ATACK_

Hard Mode:
999999 999999 KKKKKK KKKKKK

Infinite missiles and health with all upgrades:
NARPAS SWORD0 000000 000000

Start with Morph Ball and Bombs:
000000 000000 4G0000 00000H

Suitless Samus:
JUSTIN BAILEY / ------ ------

Start with Suitless Samus:
000000 000020 000000 000020

Start on Norfair with Suitless Samus and infinite missles. No item upgrades except missles:
SAMUS8 RIDLEY 444444 444444

Start at Kraid's Lair with the Long Beam, Ice Beam, Bombs, High Jump Boots, Screw Attack, Varia, Suitless Samus, and 255 Missles:
JUSTIN BAILEY ~~~~~~

Start in Tourian, with Mother Brain defeated:
Samus Beats /Mother Brain (enter spaces and one AFTER the last word)
(Thanks to spidey1987@hotmail.com)