How to unlock 6th Class:
Go to the class select screen and highlight the classes and press quickly Pirate, R Trigger, Thief, R Trigger, Warrior, Trigger R, Archer,R Trigger, Pirate, R Trigger, Warlock, R Trigger, Thief, R Trigger, Warlock, R Trigger, and Thief, R Trigger

Easy way to get money:
First your magic gauge needs to be at 4. now go to the raven and beat him. keep beating him and you will have lots of money.

Easy Money:
An easy way to get money is have a friend who has a lot of money. Go to any level and raise your power gauge to max. Keep on pressing Y on your partner. You will receive 50 gold every time you hit them. Complete the level and you'll have lots of money!

Hidden Character Class:
Enter the class selection screen, then quickly highlight the following classes in order and press R over each before proceeding to the next: Pirate, Thief, Warrior, Archer, Pirate, Warlock, Thief, Warlock, Thief.