Megaman X3

Hints & Tricks - Super passwords:
The following password will give you three Sub Tanks, four Heart Tanks, the Robot Capsule for the underwater ride armor, and the Air Dash upgrade for your legs. Also, only Gravity beetle is destroyed and Zero is not dead: 4521-4887-6256-1141.

Enter 3367-8683-6772-3875 as a password for all eight hearts tanks, all four sub-tanks (full), all four chips upgrades (X-Golden Armor, inclued Zero Beam Saber) , all four Robots , nine lives, all Bosses defeated, and the final fight for Sigma.

Enter 4746-5186-6258-7747 as a password for all the modifications except for the Saber, and no chips, Bit destroyed, Byte and Vile not destroyed, all the life ups except for the Gravity Beetle life up, and only Gravity Beetle, The Rhino, and the Electric Catfish destroyed. This will allow you to get the majority of the Bosses yourself, and still be able to get the Golden Armor or pick a chip and have all the modifications and maximum life.

Enter 5414-6685-6872-3114 as a password for everything.

Enter 3487-4135-6315-1156 as a password to have all 8 Hearts, all 4 Robot Armors, all 4 Sub-Tanks, all 4 Body Armor parts, no Chips, Bit, Byte and Vile defeated, and no special weapons. You can defeat all 8 Mavericks with a complete advantage over them and will not have to worry about the three HeadHunters because they are already dead.

Enter 8626-4335-6318-7356 as a password for all but Gravity Beetle's heart tank, all armor upgrades(not the Golden Amor), all sub-tanks, all ride-armors, only Tunnel Rhino and Volt Catfish have been defeated, leaving a decent challenge.

Other passwords:

Have heal chip
Enter 3217-1383-6772-3821 as a password.

Have arm chip
Enter 1154-2165-6162-7181 as a password.

Have leg chip
Enter 3217-1353-6772-3871 as a password.

Have armor
Enter 7257-5563-6462-7841 as a password.

At last level fully powered
Enter 6164-4155-6872-3166 as a password.

No upgrades, all weapons, 4 sub tanks, 7 heart tanks, Bit Byte and Vile destroyed, Beam Sabre, and last level
Enter 1455-6863-6427-7185 as a password.

Hints & Tricks - Alternate Boss:
Destroy Bit with the Triad Thunder or the Frost Shield, and Byte with the Drill Fang. You will encounter a different Boss at the final Boss stage.
Information in this section was contributed by Drake Runner.

Hints & Tricks - Zero's Beam Saber:
Defeat Vile with the S. Blades, and have Zero still alive. Play only as X in the first two stages in Dr. Doppler's Lab. In the second stage of Dr. Doppler's Lab, after the water pit area but before the mini-Boss, switch to Zero. Charge up and defeat the "bug". It will fall on Zero, he will be severely damaged, and will give you his Saber. The Saber will be saved with a password.
Information in this section was contributed by Dan Schielke.

Hints & Tricks - Golden Armor and chip enhancement:
When at the first stage of Dr. Doppler's Lab, go through the stage until reaching a pit with falling spiked balls. Cling to the left wall of the pit. Slide down until you fall into a room that contains a capsule. Walk inside to reach the Orange Bomber and get every single enhancement chip. Note: You must have full health and all the power-ups. You may have a chip if this does not work. The Golden Armor can not be saved with a password.
Information in this section was contributed by Dan Schielke.

Hints & Tricks - Body Upgrade without the Arm Upgrade:
Get the Leg Chip. When you get to the area where it normally requires that you have the Arm Upgrade, and Gravity Beetle's attack, with the Leg Chip, dash upwards twice and wall jump off the right wall. If you are lucky, you can land on the wall, and wall jump up.
Information in this section was contributed by muku muku17.

Hints & Tricks - Helmet Chip:
The Helmet Chip will also fill up the Sub-Tanks, as well as X's main health.
Information in this section was contributed by Drake Runner.

Hints & Tricks - Extra Saber damage:
When attacking a Boss, get as far as away as possible. Then, execute the Saber Shot. This will take off about 25% damage then will gradually decrease the life of the boss. This will do more damage than if you had gotten close to the Boss.

Hints & Tricks - Extra damage for Beam Saber:
If you stand in front of a Boss use the Beam Saber, his life will be halved. However if there is a lot of space between you and the Boss, then he will be almost defeated.

Hints & Tricks - Fast Beam Saber charge:
Do not get the Arm Upgrade. If you get the Beam Saber that way, you only need to charge until you are yellow.

Hints & Tricks - Easy power-ups:
Use the Frost Shield on enemies. Not all enemies will give out power-ups, but most will give out big and small.

Hints & Tricks - Easy extra lives:
In the Doppler stage, where you must defeat all the Bosses, shoot the Beam Saber on the standing object. Usually if you shoot on it, healing power-ups will appear. However, if you shoot on it with the Beam Saber an extra life will appear.