Golden Sun: The Lost Age - Codes
Name Extra Characters
When you first start a new game and the screen comes up to Felix, name him, and then before ending, press select 3 times. If you did it right, you should hear a chime. Press END and you'll be able to name Jenna, Sheba, and Piers.
When you're naming Piers, name him, and then before ending, press these in following order:
UP, DOWN, UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, UP, RIGHT, DOWN, LEFT, UP, SELECT
After hearing another chime, you'll be able to name Garet, Ivan, and Mia.
Unlock the Sound Test
Go to Battle mode and talk to a lady near the left side of the screen while holding the R button. Use left and right to choose a number and A to listen to that numbered tune. Press B to exit. You can only listen to the music in the game your saved file has already heard in the game.
Unlock all the Music in the Sound Test
There will be a lot of numbers that will never be available to you. Complete the game, save your cleared file, and select this file while going into Battle Mode. All the numbers should be available.
Unlock Easy Mode
Complete the game and save your cleared file. Start a new game and choose the option to play in Easy Mode. You'll start at the beginning with the same stats you had in your cleared file.
Unlock Hard Mode
Complete the game and save your cleared file. Start a new game and choose the option to play in Hard Mode. You'll start at the beginning again, but the enemies are much more deadlier.
Alternate Battle Themes
This can only be done when you have been reunited with Isaac's party. Depending on what characters you have out to battle with, the music will change. You can have either the Lost Age battle theme, Jenna's battle theme, or the original Golden Sun battle theme. Experiment with them!