| Unlockable: | How to Unlock: |
| Baragon | Free Baragon from the crystals in "A Friend in Need" at Monster Island as a Alien. Defeat him in the "Baragon" stage and buy him for 15,000 points. |
| Biollante | Be a Earth Defender and play "Rumble in the Surf" at Tokyo. Destroy the building with vines and defeat Biollante later on and buy her for 30,000 pts. |
| Krystalak | Play "Terran Mind-Control" at New York as an Alien. Destroy large crystal in crater and nine days later defeat Krystalak and buy him for 20,000 pts. |
| Mecha-King Ghidorah | Play "Invasion" as a Earth Defender at San Francisco and defeat Ghidorah. Play "M.K.G" and defeat Mecha Ghidorah and buy him for 50,000 points. |
| Megagurius | Be a ED and play "Enter General Gyozen" at London. Destroy three teal crystals. Return near the end and defeat Megaguirus. Buy her for 20,000 pts. |
| Obsidius | Play a mech from GDF and play "Big Trouble" at Seattle. Destroy three cone crystals. Defeat Obsidius later and buy him for 20,000 pts. |
| SpaceGodzilla | Play as a Mutant and obtain four Power Surges and beat "Tyrant" at the end of the game. SpaceGodzilla will be added to the shop and will cost 100,000. |
| Titanosaurus | Use a mech from GDF and play "Soloist" at Sydney. Destroy three circular ice structures. Return later and defeat the dinosaur. Buy him for 25,000 pts. |
| Varan | Play as an Alien and destory the crystals on the Mothership in "On the Mothership". Return to the level and defeat Varan and buy him for 30,000 pts. |
