Godzilla: Destroy All Monsters Melee
Unlock Godzilla 2000:
To unlock Godzilla 2000, complete Adventure mode with Godzilla 90′s
Unlock Destroyah:
To unlock Destroyah, complete Adventure mode with Godzilla 2000.
Unlock Gigan:
To unlock Gigan, beat Adventure mode with Aguirus.
Unlock King Ghidorah:
To unlock King Ghidorah, beat Adventure mode with Megalon.
Unlock Mecha-King Ghidorah:
To unlock Mecha King Ghidorah, beat Adventure mode with King Ghidorah.
Unlock Mecha-Godzilla:
To unlock Mecha Godzilla, complete Adventure mode with Destoroyah, Rodan and Mecha-King Ghidorah.