G:MegaMan X  

C:Invincible|7E0BD805|Parasyte| 
C:Infinite Dash|7E0BFA18|Helder| 
C:Walk Through Enemies (Take No Damage)|7E0BD808|Fangs| 
C:Walk Through Enemies Off (Use When You Can't Enter Boss Doors, Etc.)|7E0BD800|Fangs| 
C:Infinite Health|7E0BCFFF|Fangs| 
C:Air Walker|7E0C0C2C|Fangs|Keep jumping, get hit to disable. 
C:Max Health|7E1F9A20|Fangs| 
C:Infinity Lives|7E1F8009|Fangs| 
C:1 Shot Kills Everything|7E0E8F01|Fangs| 
C:Have Full Subtank 1|7E1F83FF|Fangs| 
C:Have Full Subtank 2|7E1F84FF|Fangs| 
C:Have Full Subtank 3|7E1F85FF|Fangs| 
C:Have Full Subtank 4|7E1F86FF|Fangs| 
C:All Armor Upgrades|7E1F990F|Fangs| 
C:All Charge Shots Are Level 3|7E0C0301|Helder| 
C:Weapons|69858194|?| 
C:Infinite Energy|7E0C1311|?|  

T:Have Weapons Codes  

C:I. Shotgun|7E1F9664|Fangs|Activating a weapon makes the game think you've beaten that weapon's boss.
C:C. Sting|7E1F8A64|Fangs| 
C:R. Shield|7E1F8C64|Fangs| 
C:F. Wave|7E1F8EFF|Fangs| 
C:S. Tornado|7E1F90FF|Fangs| 
C:E. Spark|7E1F92FF|Fangs| 
C:B. Cutter|7E1F94FF|Fangs| 
C:H. Torpedo|7E1F88FF|Fangs|  

T:Alternate Codes  

C:Start With 1 Life|8094FA00|Most by ?| 
C:Start With 5 Lives|8094FA04|| 
C:Start With 7 Lives|8094FA06|| 
C:Start With 10 Lives|8094FA09|| 
C:Tiny Energy Bar|8094FF02|| 
C:Start With Less Energy|8094FF08|| 
C:Start With More Energy|8094FF20|| 
C:Start With Max Energy Way Above Max|8094FFFF|| 
C:Infinite Lives|809B59AD|| 
C:Infinite Turbos|809BB9AD|| 
C:Start With All Weapons And All Enemies Defeated (Except Sigma)|809F05DE|| 
C:Start With Flamethrower|809F15DD|| 
C:Arm Cannon Stays Extended After Shooting|81948EA5|| 
C:Cross-Weapons!|8194BEA5|?|Select any special weapon (or do the hadouken fireball). Fire it once. Return to X-buster and you can fire it alternating with the special weapon you selected. Now select another special weapon, fire it once, and return to X-buster and you can fire the two special weapons alternating, and never run out of either! Some weapons will actually combine with the other weapon and make it act differently.  
C:Infinite Weapons Once You Have Them|8194EEA5|| 
C:Glow Brighter When Powering Up|81982600|| 
C:Automatic Rapid Fire Gun!!|81984550|| 
C:Disables Weapon Charging|81984700|| 
C:Weapon Charges To 1st Power Level Faster|81986600|| 
C:Level 2 Won't Fire|81987600|| 
C:Level 3 Won't Fire|8198B700|| 
C:Mega Man Intangible By All Enemies!|849D24AD|| 
C:No Recoil From Injuries|849D34AD|| 
C:All Hits Take Only 1 Bar Of Energy|849D53D1|| 
C:Infinite Energy|849D54AD|| 
C:All Enemies Bulletproof|849E2180|| 
C:Some Enemies Become Bulletproof That Were Not Before; Others That Had Armor Lose It|849E4180|| 
C:All Enemies Are Defeated With One X-Buster Shot|849E7110|| 
C:Most Enemies Are Defeated With One Shot|849E7180|| 
C:Normal Shots Pass Through Enemies (Can Only Injure The First One They Pass Through); Level 3/4 Shots And Some Special Weapons Continue Firing Until The Enemy Is Out Of The Way Or Is Destroyed (Good On Bosses!)|849E8180|| 
C:After Shooting Enemies Enough To Destroy Them You Can Run Through Them, But They Can Still Shoot You|849EC180|| 
C:Bogus Jump|86B9C604|| 
C:Jump Higher|86B9C607|| 
C:Mega-Jump|86B9C609|| 
C:Start With All Weapons And All Enemies Defeated (Except Sigma)|1089F05D<br>1089F1E0<br>1089F287  
C:Cross-Weapons! Select Any Special Weapon (Or Do The Hadouken Fireball)|10994BEA<br>10994C50<br>10994D19  
C:Infinite Weapons Once You Have Them|10994EEA<br>10994F50<br>10995000 
C:All Enemies Are Defeated With One X-Buster Shot (An Improvement On The One)|10C9E711<br>10C9E800<br>10C9E987  
C:Mega-Jump|10EB9C60<br>10EB9D90<br>10EB9E87  