Cheat Codes:
At the main menu highlight "Versus" and then, in this order, press and hold L, B, R, and then, in this order, release B,R,L. If done correctly, a cheat menu will appear. Enter the following codes to unlock these cheats. If you entered the correct code, Godzilla will roar.
Effect: Code
12 Contnues in Adventrue Mode: 548319
Add A.I. Player to Melee: 154974
All Cities: 107504
All Cities and All Monsters: 863768
All Gallery Items: 962129
All Monsters: 209697
All Monsters Are Invisiable: 600225
All Players Are Small: 154974
All Players Deal Quadruple Damage: 817683
All Players Take No Damage: 569248
Black and White Mode: 860475
Boxing Ring: 440499
Constant Energy for Player One: 778393
Constant Energy for Player Two: 881557
Constant Energy for Player Three: 597558
Constant Energy for Player Four: 218967
Destoroyah: 352117
Disable HUD: 880460
Display Game Version Number at Option Menu: 097401
Unlock Hints:
Get King Ghidorah: Beat Adventure mode with Megalon.
Get Gigan: Beat Adventure mode with Angilas.
Get Destroyah: Beat Adventure mode with Godzilla (Millennium).
Get Rodan: Beat Adventure mode with Gigan.
Get Mechagodzilla: Beat Adventure mode with Rodan.
Get Mecha-King Ghidorah: Beat Adventure mode with King Ghidorah.
Get Orga: Beat adventure mode using all characters then beat the adventure mode one more time using Godzilla 2000.
Unlock Pictures In Picture Gallery:
To unlock pictures in the Gallery, you must play through Adventure Mode on the Medium or Hard difficulty setting. Some buildings that you destroy will reveal Silver Atari symbols. Pick these up to unlock a picture.
