Send Option
If you finished Golden Sun, and have a file that says "Clear Data", then you are now able to activate this code!
To activate, hold down L and R, and press and hold Left on the D-pad. Now press B; after that you'll see a new icon labled "Send". Now you can send your party's stats to The Lost Age!

You have two ways of sending your data: Game Link Cable, or Password. Using the Link Cable would be easier and will send ALL your data. The Password option will take longer and is harder, and won't send all your data, only a limited amount.

For the password, you have three selections: Gold, Silver, and Bronze medal. Each medal will contain a password. Gold has the hardest password, but will send the most data. Now grab your Lost Age game, and punch in the password the medals give you in Golden Sun! Your data has been sended!