Hold in the right stick and use the D-Pad to enter the following codes:

Invincibility: DOWN, UP, LEFT, RIGHT, DOWN, UP.
Force Abilities at Level 3: LEFT, DOWN, RIGHT, UP, DOWN, DOWN.
All weapons: RIGHT, RIGHT, LEFT, LEFT, DOWN, UP.
Skip Stage: UP, UP, DOWN, DOWN, LEFT, RIGHT.
Unlimited Force: UP, DOWN, UP, LEFT, UP, RIGHT.
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Keep lightsaber
After you complete the game (Light or Dark side), you will see the credits. During the credits press Y, X, B. If you hear a lightsaber ignite, you have done this correctly and you have unlocked the lightsaber that you ended with for a new
game. For example, if you end the game with a saberstaff and execute the code, you will be able to use that exact saberstaff when you begin a new game.