Go to the first level in the game. You'll start the level by facing a long walkway. Turn around from the way you started out facing and you'll see a Wookie behind you. Go up and talk tou the Wookie by hitting the Y button twice. Then the Wookie will follow you and help you kill enemies throughout the level (but be careful, because if you hit the Wookie with one of your own weapons, then he will turn against you and start attacking your character).
Go to new game then press A. Then name the game "greytherat". All levels and bonus levels then shown when you play.
When you start on the very first level you start facing in the direction where you should go. If you turn around and go all the way to the end of the walkway you will find, guess who...Chewbacca. Once you walk up to him and/or say something he will follow you through this level and help you until he is killed.
In order to make slow motion last through an entire level or section of a level instead of 6 seconds, do this. Slow down time. Throw your saber immediatly after time is slowed. When time revearts back to normal, wait for the saber to drain your force power down to about a bit less than halfway. Then, slow time again. After your saber returns, and the 6 seconds is up, time will sound sort of normal, but sort of slow, and you will walk in slow motion. To get out of this, slow time again. Note:You have to hold the force button down untill your saber returns and you have finished the cheat.
to get stronger force power put in masteryoda as your name on new game
When you get to main menu, go to new game and press A. Then put your name in as M1A2U3L4!?
Then you get all levels up to The Final Battle with Darth Maul.