Secret Ending - Beat the game at 100% in under 2 hours.

Map Sector Complete Info - Once you completed the game, (do not turn your game off) go back to your game file and select [Start Over] from the pop up menu. At the opening movie sequence press start. At the bottom of the screen will displayed in game time, all your upgrades, map sector in the start menu, item collected in that sector and item missed in that sector.

All Endings: Successfully complete the game in:

Samus with suit off - Under 2 hours with 100%.

Samus with suit off - Under 2 hours, under 100%.

Samus with suit off - Over 2 hours, 100%.

Samus with helmet off - Over 2 hours, under 3 hours, under 100%.

Over 3 hours, under 100%.

Samus without her helmet - Under 4:00 with at least 60% of the items collected.

Increase health - When you have to do the last objective with the wind machines, gather X
Parities to get a lot of life.

Pseudo Screw attack - To kill a host of an X parasite without being attacked, charge your beam to full power and perform a spinning jump into the enemy. This will destroy most minor enemies in one hit. The stronger ones will take more hits, but you will sustain damage each time you
hit them. This manoeuvre will also work on certain Bosses. The real Screw attack gained by defeating Ridley X is far more powerful. granting you invincibility and the ability to destroy all enemies on contact.

Speed boost warp - Once you have defeated Serris, find a place to run. Keeping going until you get your speed boost, then press Down, A and choose the direction you wish to move. Samus will warp at very high speed, destroying anything in her path until she strikes a solid object that is not made of speed booster blocks.

Secret Ending - Beat the game at 100% in under 2 hours to get the secret ending.

Secret Message - To see the secret message, you must defeat Nightmare in Sector 5 (ARC) and return to a Navigation Room WITHOUT getting the Diffusion Missile upgrade. A conversation between you, Adam and the Secret Guy will commence.

Wall jump - To reach platforms easier, spin jump next to a wall, press the D-pad opposite to the direction that you went, then jump. Samus will touch the wall and propel herself off it in a another jump. This can be done repeatedly.
Sent in by Kid Lance

Skipping levels - After you go through the restricted section, go to the navigation room just beside the elevator. When you talk to it, it will instruct you to go to another place. If you want to skip a couple levels, talk to it again. It will instruct you to go to the Operation room to set a collision course with a planet. You will now be able to go there.

Increase health - When you have to do the last objective with the wind machines, gather X Parities to get a lot of life.

Gamecube  - Near the start of the game when the X are tying to make the environment to their own conditions and block the fans, go to one blocking the fans (the ones that you have to kill with missiles and give off X Parasites). It will be floating around. Look at the top left of it, in the very corner of the X. You will see a Gamecube.

Wall jump - To reach platforms easier, spin jump next to a wall, press the D-pad opposite to the direction that you went, then jump. Samus will touch the wall and propel herself off it in a another jump. This can be done repeatedly. Once you have the space jump, this is unnecessary.

Super warp jump  - This is slightly difficult to perform and may require a few attempts. Find a place to run until your Super Run kicks in. This is obtained after you defeat Serris. Then, quickly press Down. Samus will kneel down and glow. Then, jump. Samus will fly upward until she hits a solid object not made of speed blocks.

Defeating SA-X - When you first get into the room where you fight SA-X, charge your Power Beam and go up to the door. Stay with ground combat. Since it is charged, keep it like that and wait until he is normal (and not a green ball and invulnerable). Take the first shot, then hold it down to charge again. He should jump into the air and land next to you. This is your chance to shoot. Do the same thing repeatedly until he gets fuzzy. When you hit him he will turn into a giant monster. The only way he can hurt you is to jump on you. Charge up your beam and hit him in the face four times. His eyes will go red. Walk next to him and he will die. On the spikeball, charge up your missiles, When his eye opens up, shoot then jump over him immediately. If you run low on health, use your Screw Attack and hit him. A group of Xs will appear. Collect as many as needed. You can do this repeatedly.

Defeating the spider - When the first set of fire comes down, turn into your Morph Ball and go all the way over to the fire ball on the right. Wait until it starts to go to the middle. Then, keep shooting missiles (when the spider is charging up) until it shoots the three fire balls. You will get hurt, but at least you will hit him. You have to keep going next to the fire balls until he loses his legs. Once this happens, you can go to the right of the stage and shoot missiles up at him. When he turns red, go to the left of the stage and shoot up.

Hyper Screw attack - This move is used while performing the Speed Booster. Note: You will also need the Screw Attack. While running in hyper mode, jump forward into a Screw attack and do not stop moving forward. You will notice that you will still be in hyper mode while airborne. If you continue the Screw attack with the Space Jump and never stop moving, you will remain in hyper mode until you run into something solid or stop moving. This technique is very useful for breaking boost blocks with no extra running space around them.

Pseudo Screw attack - To kill a host of an X parasite without being attacked, charge your beam to full power and perform a spinning jump into the enemy. This will destroy most minor enemies in one hit. The stronger ones (for example, Zebesian Space Pirates) will take more hits, but you will sustain damage each time you hit them. This maneuver will also work on certain Bosses. The real Screw attack gained by defeating Ridley X is far more powerful. granting you invincibility and the ability to destroy all enemies (except Bosses) on contact.

Fire over ledge while hanging - You can fire over the ledge that you are hanging on by charging the Beam and releasing it. Note: This may only be done with the Wide Beam.

Defeating Omega Metroid - This trick is easy to do and with some luck, you will not get hit at all in the entire battle. When the Sa-X sacrifices itself, get the Ice Beam. Then, when you start shooting the Boss in the chest, rapidly press B to keep hitting it. The Omega Metroid should cry in pain several times and will not be able to hit you. In the battle with the Omega Metroid, when it swipes you, Samus will become motionless for a few seconds. However, if you rapidly press Up, you will cut this time down dramatically.
Sent in by Tony001203

Cheating Device Codes:

1E Enable Code (Must Be On) 97C0A24C 0B3C 6587B46A 74B1 02E9B29A 7260
Infinite Health 77A1C02A 7B42
Max Health F7A180A8 7BC2
Infinite Missles 7681C2DA 7742
Max Missles F6818258 77C2
Always Run At Super Speed 769140CB F658
Have All Weapons/Suits/Abilities DCE7BC8C 39C3
<>
(m) e3867a25| 806c0ddb | ae6b830a | a8006ef1
Infinite Health c746328a | 2787b50a
Max Health 8d44d82f | 1c20c6f2
Infinite Missiles a6f25692 | a02899d7
Max missiles 91be71a8 | e7cce188
Infinite P Bombs 75e86f4b | 8a26f96a
Max P Bombs 60256c87 | 92373668
<>
(M) 167201ed | 1960132f | c2f0148c | 3080f012
Inf health 300b9786 | c5272e9d
Have missiles/bombs ae9c29a6 | a3d260ff
Max missiles ed05f0d0 | de814736
Max mines 75e86f4b | 8a26f96a
Invincible 51d7429f | a8d97c5f
Supermetroid 28b05ffd | 4da081ae | 5b17fa11 | ca8e4a36