At the main menu, highlight "Versus" mode, then hold L + B + R (in that order), then release B, R, L (in that order) to display the cheat entry screen. Enter one of the following codes to activate the corresponding cheat function:

All cities and all monsters

Enter 863768 as a code. If you entered the code correctly, you will hear a sound.

Monster Island level

Enter 745749 as a code. If you entered the code correctly, you will hear a sound.

Mothership level

Enter 972094 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Mecha Godzilla.

Boxing ring level

Enter 440499 as a code. If you entered the code correctly, you will hear a sound.

All cities

Enter 107504 as a code. If you entered the code correctly, you will hear a sound.

All gallery items

Enter 962129 as a code. If you entered the code correctly, you will hear a sound.

All monsters except Orga

Enter 753079 as a code. If you entered the code correctly, you will hear a sound.

All monsters

Enter 209697 as a code. If you entered the code correctly, you will hear a sound.

Play as Godzilla 2000

Enter 637522 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Godzilla 90s version.

Play as Gigan

Enter 822777 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Aguirus.

Play as King Ghidorah

Enter 939376 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Megalon.

Play as Rodan

Enter 724284 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Gigan.

Play as Destoroyah

Enter 352117 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Godzilla 2000.

Play as Mecha King Ghidorah

Enter 504330 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with King Ghidrah.

Play as Mecha Godzilla

Enter 643861 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with Destoroyah, Rodan and Mecha King Ghidrah.

Play as Orga

Enter 622600 as a code. If you entered the code correctly, you will hear a sound. Alternately, successfully complete adventure mode with all characters once, then complete adventure mode again on the medium difficulty setting with Godzilla 2000.

Black and white mode

Enter 860475 as a code. If you entered the code correctly, you will hear a sound.

Technicolor mode

Enter 394804 as a code. If you entered the code correctly, you will hear a sound.

Twelve continues in adventure mode

Enter 548319 as a code. If you entered the code correctly, you will hear a sound.

Add AI player to Melee (human versus AI)

Enter 154974 as a code. If you entered the code correctly, you will hear a sound.

Display game version number at option menu

Enter 097401 as a code. If you entered the code correctly, you will hear a sound.

Ending credits and play Godzilla March Theme

Enter 339223 as a code. If you entered the code correctly, you will hear a sound.

Player one is small

Enter 558277 as a code. If you entered the code correctly, you will hear a sound.

Even numbered players are small

Enter 600095 as a code. If you entered the code correctly, you will hear a sound.

Player two is small

Enter 689490 as a code. If you entered the code correctly, you will hear a sound.

Odd numbered players are small

Enter 853955 as a code. If you entered the code correctly, you will hear a sound.

Player three is small

Enter 203783 as a code. If you entered the code correctly, you will hear a sound.

Player four is small

Enter 495355 as a code. If you entered the code correctly, you will hear a sound.

All players are small

Enter 154974 as a code. If you entered the code correctly, you will hear a sound.

Player one takes no damage

Enter 152446 as a code. If you entered the code correctly, you will hear a sound.

Player two takes no damage

Enter 724689 as a code. If you entered the code correctly, you will hear a sound.

Player three takes no damage

Enter 367744 as a code. If you entered the code correctly, you will hear a sound.

Player four takes no damage

Enter 317320 as a code. If you entered the code correctly, you will hear a sound.

All players take no damage

Enter 569428 as a code. If you entered the code correctly, you will hear a sound.

Player one deals quadruple damage

Enter 940478 as a code. If you entered the code correctly, you will hear a sound.

Player two deals quadruple damage

Enter 930041 as a code. If you entered the code correctly, you will hear a sound.

Player three deals quadruple damage

Enter 537651 as a code. If you entered the code correctly, you will hear a sound.

Player four deals quadruple damage

Enter 889610 as a code. If you entered the code correctly, you will hear a sound.

All players deal quadruple damage

Enter 817683 as a code. If you entered the code correctly, you will hear a sound.

Military deals quadruple damage

Enter 970432 as a code. If you entered the code correctly, you will hear a sound.

Disable HUD

Enter 880460 as a code. If you entered the code correctly, you will hear a sound.

Players health regenerates

Enter 597378 as a code. If you entered the code correctly, you will hear a sound.

Throw all buildings and objects

Enter 248165 as a code. If you entered the code correctly, you will hear a sound.

Indestructible buildings

Enter 451129 as a code. If you entered the code correctly, you will hear a sound.

Hedorah (Smog Monster) in every game

Enter 288730 as a code. If you entered the code correctly, you will hear a sound.

No Hedorah (Smog Monster)

Enter 584408 as a code. If you entered the code correctly, you will hear a sound.

Player one invisible

Enter 659672 as a code. If you entered the code correctly, you will hear a sound.

Player two invisible

Enter 493946 as a code. If you entered the code correctly, you will hear a sound.

All monsters invisible

Enter 600225 as a code. If you entered the code correctly, you will hear a sound.

Energy does not recharge, but energy weapons do more damage

Enter 690242 as a code. If you entered the code correctly, you will hear a sound.

Toggle military

Enter 728629 as a code. If you entered the code correctly, you will hear a sound.

Player indicators always visible

Enter 860068 as a code. If you entered the code correctly, you will hear a sound.

Constant full energy for player one

Enter 778393 as a code. If you entered the code correctly, you will hear a sound.

Constant full energy for player two

Enter 881557 as a code. If you entered the code correctly, you will hear a sound.

Constant full energy for player three

Enter 597558 as a code. If you entered the code correctly, you will hear a sound.

Constant full energy for pplayer four

Enter 218967 as a code. If you entered the code correctly, you will hear a sound.

No health power-ups

Enter 221086 as a code. If you entered the code correctly, you will hear a sound.

No Mothra power-ups

Enter 491040 as a code. If you entered the code correctly, you will hear a sound.

No energy power-ups

Enter 803358 as a code. If you entered the code correctly, you will hear a sound.

No rage power-ups

Enter 666500 as a code. If you entered the code correctly, you will hear a sound.

No freeze tanks

Enter 223501 as a code. If you entered the code correctly, you will hear a sound.

No power-ups

Enter 229497 as a code. If you entered the code correctly, you will hear a sound.

No power-ups except Energy

Enter 553945 as a code. If you entered the code correctly, you will hear a sound.

No power-ups except Rage

Enter 660398 as a code. If you entered the code correctly, you will hear a sound.

No power-ups except Health

Enter 270426 as a code. If you entered the code correctly, you will hear a sound.

Player one always in Rage

Enter 159120 as a code. If you entered the code correctly, you will hear a sound.

Player two always in Rage

Enter 491089 as a code. If you entered the code correctly, you will hear a sound.

Player three always in Rage

Enter 450514 as a code. If you entered the code correctly, you will hear a sound.

Player four always in Rage

Enter 702905 as a code. If you entered the code correctly, you will hear a sound.