Enter one of the following passwords to begin the game with the corresponding status:
|All Bosses, four E-Tanks||A5, B2, B4, C1, C3, C5, D4, D5, E2|
|Four E-Tanks||A5, B1, B3, C4, D2, D3, E1, E4, E5|
At the title screen, hold [Jump] + [Shoot] for several seconds to be able to use Hadoken manually regardless of the meter or first defeating Ryu.
Press [Shoot] + [Shift Weapon Right]. Note: This cannot be disabled.
At the stage selection screen, hold [Shoot] while highlighting Ryu, and press [Right] [Right] [Right] [Left]. If you entered the code correctly, you will hear a sound. Mega Man will no longer have a helmet at the stage selection screen.
Pause the game, then hold [Jump] and press [Up] [Down] [Down] [Down] to play Guile's theme music. Repeat the code to disable its effect.
Successfully complete the game with at least four "Perfects", and Akuma will challenge you after the final battle.
Get at least four "Perfects" in Boss Rush mode before fighting Bison, and Sagat will challenge you before fighting Bison.
Use your E-tank to get maximum health just before killing a Boss.
Intentionally die, then allow the timer to reach "0". Resume the game, and you will have all the tanks that were previously collected. You can now recollect those same E-Tanks and add them to your total.
There is a computer in the background of the room in Seth's Lab where the eight Boss rematches occur. It has two large black and white swirling orbs. Shoot the orbs with a charged Mega Buster shot to get a large health tank and a large weapon energy tank. Those orbs will respawn after each Boss fight.
In Version 2.0, collect the four energy tanks in C. Viper, Chun Li, Dhalsim, and Ryu's stages. Then, go back to Chun Li's stage, and defeat her. After getting the password, write it down, and restart the game. When you start the game after using the password, go to C. Viper, Dhalsim, and Ryu's stages again to get three more energy tanks. You can repeat this as many times as desired as long as the stage can be played again after entering the password.