Successfully complete the indicated level to unlock the 3D model and concept art for the corresponding monster. Note: When the "Monster Island, The Final Battle" level is completed, the 3D model and concept art for the character you are playing as will be unlocked.

Atorgon: Atlantis Rises From The Deep
Baragon: Hedorah Terrorizes San Francisco
Biollante: Biollante Attacks Paris
Destoroyah (NPC): Monster Island, The Final Battle
Ebirah: Ebirah Swamps Tokyo
Hedorah: Hedorah Terrorizes San Francisco
Jet Jaguar: Orga Thrashes Sydney
Manda: Atlantis Rises From The Deep
Mecha King Ghidorah: Mecha King Ghidorah Ravages Bangkok
Mechagodzilla: Cairo Is... Lost In Space
Megaguirus: Biollante Attacks Paris
Moguera: Mecha King Ghidorah Ravages Bangkok
Orga: Orga Thrashes Sydney
SpaceGodzilla: Monster Island, The Final Battle
The Sphinx: Cairo Is... Lost In Space
Titanosaurus: Ebirah Swamps Tokyo