enter it in after you select your characters at the versus screen.

If you have the Naomi arcade version of MvC2, you'll need to wait for the characters to unlock either by waiting or by tripping the credits switch on the machine repeatedly. Alternatively, you can enter these hidden unlock codes to get the game ready for tournament play immediately. You need to do the codes in order, but if you're already on level 25 then you can just skip the ''jump to level 24'' step.

Go to game test mode, and do the following 3 moves.

Finish off you opponent's last character with any of Sakura's supers. After the big flash, but
before the game says ''K.O.'' hold down light and fierce kicks. If done correctly, her friend will run out and start dancing with Sakura.

After you win a match and your character does his/her victory pose, press Start. You'll be able to attack your fallen opponent while he/she is down.

If you want to alternate player colors, be sure it's sorrounded by a yellow border, then select it with Assist1 or Assist2, this way you will get your player with diferent clothes' colors.

Enter it in at the versus screen after you select your characters, and hold it until the match begins

Whenever you play either clock tower stage, the clock in the background will be set to real-world time, as long your dreamcast's internal clock is.

To get the hidden characters at lower prices, keep on entering and exiting the shop. Eventually, the hidden characters will cost less.

Unlock all the costumes and hidden characters to be able to choose the same character mutiple times on the same team.

After you win a match and your character does his/her victory pose, press Start. You'll be able to attack your fallen opponent while he/she is down.

Set the game in Training Mode and let it sit--every minute you let the game sit will earn you more points used for unlocking characters and costumes. You can earn up to 9,999 points at a time doing this.