TechLookz

Cheat mode:
Go to the main menu, hold L + B + R (in order) at the main menu, then
release B, R, L (in order) to display the code entry screen.

After type one of the cheat codes below:

Master code: 246518
Unlock all Cities - 659996
Unlock all Monsters - 525955
Challenges - 975013
HP Restores - 536117
Energy doesn't restore - 122574
Player1: invincibility - 338592
Player1: unlimited energy -? 819342
Player1: 4x damage - 259565
Player1: invisible - 531470
Player2: unlimited energy - 324511
Player2: invisible - 118699
Player2: invincibility - 259333
Player2: 4x damage: 927281
Player3: 4X damage - 500494
Player3: unlimited energy - 651417
Player3: invisible - 507215
Player3: invincibility - 507215
Player4: 4X damage - 988551
Player4: unlimited energy - 456719
Player4: invisible - 198690
Player4: invincibility - 485542
100,000 pts. - 532459
Buildings can't be destroyed - 812304
Gallery - 294206
Gallery 2 - 409014
Godzilla: Final Wars Profiles - 409014
100,000 Points: 532459 Note: Can use only once
150,000 Points: 667596 Note: Can use only once
200,000 Points: 750330 Note: Can use only once
Indestructible buildings: 812304
One time energy: 122574

Watch ending movie:
Finish the game in hard mode

Unlock Space Godzilla, King Gidorah and Jet Jagaur:
Finish the game twice with Megalon and Godzilla (90s or 2000).

King Ghidorah or Mecha King Ghidora: Combo:
Outrage: Press L + B + Left + X.

Mechagodzilla 3: Combo:
Ultra Flying Kick: Press L + X, then at the correct moment quickly press Up + X.

Megaguris: Combo:
Energy Drain of Doom: Press L + B or X, then quickly press B(2).

Orga: Combo:
Super Back Smash: Press L + B then quickly press Left + X.

Catching:
When an enemy throws a building or anything else, press L to catch the thrown item.

Attacking on the ground:
When you are down, press X or B to do an attack on the ground.