Free troops:
Enter the caravan screen and move the hand pointer over the troop roster. Hold Select and press Circle, Triangle, X, Square, Left, Right to have your troops fight at no cost.

All regiments (PAL version):
Enter the caravan screen and move the hand pointer over the spare book under the pile on the left. Hold Select and press R1, L1, L2, R2 to place all unit types on the troop roster.

Unlimited magic (PAL version):
Enter the caravan screen and move the hand pointer over the magic book. Hold Select and press Left, Up, Right, Down, L1, R1. No points will be deducted when a spell is cast during a battle.