Cheat mode
Hold [L] + [B] + [R] (in that order)
at the main menu, then release [B], [R], [L] (in
that order) to display the code entry screen.
All cities and all monsters
Enter "863768" as a code. A monster will roar
to confirm correct code entry.
Play as King Ghidorah
Enter "939376" as a code. A monster will roar
to confirm correct code entry. Alternately, successfully complete
adventure mode as Megalon.
Play as Destoroyah
Enter "352117" as a code. A monster will roar
to confirm correct code entry. Alternately, successfully complete
adventure mode as Godzilla 2000.
Play as Mecha Godzilla
Enter "643861" as a code. A monster will roar
to confirm correct code entry. Alternately, successfully complete
adventure mode as Destoroyah, Rodan and Mecha King Ghidrah.
Play as Orga
Enter "622600" as a code. A monster will roar
to confirm correct code entry. Alternately, successfully complete
adventure mode with all characters once, then complete adventure
mode again under the medium difficulty setting as Godzilla 2000.
All monsters except Orga
Enter "753079" as a code. A monster will roar
to confirm correct code entry.
Monster Island level
Enter "745749" as a code. A monster will roar
to confirm correct code entry.
Boxing ring level
Enter "440499" as a code. A monster will roar
to confirm correct code entry.
Player one is small
Enter "558277" as a code. A monster will roar
to confirm correct code entry.
Even numbered players are small
Enter "600095" as a code. A monster will roar
to confirm correct code entry.
Player two is small
Enter "689490" as a code. A monster will roar
to confirm correct code entry.
Player three is small
Enter "203783" as a code. A monster will roar
to confirm correct code entry.
All players are small
Enter "154974" as a code. A monster will roar
to confirm correct code entry.
Theme
Enter "339223" as a code. A monster will roar
to confirm correct code entry.
Player one takes no damage
Enter "152446" as a code. A monster will roar
to confirm correct code entry.
Player three takes no damage
Enter "367744" as a code. A monster will roar
to confirm correct code entry.