Disable Arena AI
Go to the title screen and press X, Circle, Circle, Circle, X, Square, Square, Square, X, Circle, Square, X
Easier opponents
Go to the title screen and press X, Circle, Circle, Square, X, Square, Square, Circle
Tougher Opponents
Go to the title screen and press X, Circle, Square, Square, X, Square, Circle, Circle, X, Circle, Circle, X
Max Arrows
Go to the title screen and press X, Circle, Square, Square, X, Square, Circle, Circle, X, Square, Square, X
Get Arenas
Finish all challenges in a level to unlock a arena for that level
Use Any Weapon on Any Level
Find each Tuku on ALL the levels to get a option at the Sage that allows weapons to be used on any level