Rogue Galaxy cheats and cheat codes for Playstation 2

Completion bonus:
Complete the entire game and save when prompted. Re-load the cleared 
saved game file. Go to the Galaxy map to reach the Ghost Ship.
If you hold R1 while begining a new game at the main menu, you can 
select any of the previously unlcoked costumes.

Accessing to Ghost Ship Extreme level:
If you answer correctly to all the Seventh Mystery questions in the 
Ghost Ship, you will get the Key of the Underworld as a reward. 
Use this key to unlock the Ghost Ship Extreme level.


Unlock Dolgen Edge and Captain's Clothes:
Complete the Ghost Ship. 

Unlock Truth Of The King and Kisara's Swimsuit:
Complete the Ghost Ship Extreme level. 


Earth Key location: 
Go to the Elder's hut in Burkaqua Village. 

Star Key location: 
Go to outside Angela's Bar on Myna. 

Sun Key location: 
Go to the old man's house when you reach Johannesburg. 


See the locations of treasure chests on the map:
First you have to activate every teleporter on that particular planet.
You will get a message when you walk-through the last teleporter. 
The chest are marked by yellow dot on the map.

Easily weapons and armor experience: 
Go back to planets/areas (such Rosa) where you can kill the enemies 
with a single shot. You can kill them with one shot by using your blaster.