Here you go. These are all the cheats listed on chaptercheats.com;)
Luke character location
Jedi temple, Mygeeto, Jabba's Palace, Death Star Interior.
Leia character location
Tantive IV, Theed.
Han character location
Utapau, Polis Massa.
Chewie character location
Kashyyk, Felucia, Yavin.
Vader character location
Tantive IV, Jedi temple, Dagobah, Theed.
Emporer character location
Polis Massa, Theed, Death star interior.
Boba character location
Kashyyk, Utapau, Mygeeto, Felucia, Yavin, Jabba's Palace.
Yoda character location
Kashyyk, Tantive IV, Polis Massa, Dagobah.
Obi-Wan character location
Utapau, Mustafar, Theed.
Mace character location
Jedi temple, Yavin, Death Star Interior.
Ki-Adi-Mundi character location
Mygeeto.
Aayla character location
Felucia, Jabba's Palace.
Anakin character location
Mustafar.
Grievous character location
Tantive IV, Utapau, Polis Massa, Dagobah, Mygeeto.
Maul character location
Jedi Temple, Mustafar, Jabba's Palace.
Dooku character location
Geonosis.
Jango character location
Kashyyk, Felucia, Yavin.
Note:
You can only unlock these characters by completing side tasks on the level you can find them in Campaign mode.
All hero battle:
Go to Instant Action mode and pick Mos Eisley as your level and Assault as the game type. When you begin the game you should be able to pick between heroes and villains and fight as any of "Hero" type character classes with no time limit.
Space battle points:
Select the Empire as your faction, the Imperial Pilot as your class, and a TIE Interceptor as your fighter. The TIE Interceptor has the best laser cannons, maneuverability and missiles. Wait near your capital ship and let the enemy fighters come to you. You will gain points and medals quckly. Do not get to close to them or your own turrets will kill you.
Ignored by enemies:
Go into an enemy ship and take one of their space crafts. Enemy space crafts will not attack you for a period of time.
Assault rifle:
The assault rifle is basically a mini-chaingun (Clone Commander). It fires a rapid spray of bullets at one time for powerful impact.
Beam rifle:
The beam rifle, which is the upgrade from the sniper rifle, allows you to actually shoot through multiple enemies. It will keep going through a group of enemies that are in a somewhat straight line formation until it hits the ground, wall, etc.
Flechette shotgun:
This is the upgrade for a shotgun. This shotgun has more powerful impact. It can take a Droideka's shield out in two shots. It has a slight explosion upon impact.
Guidable rockets:
You can steer these just as you would a starfighter. They will cause more damage if you use turbo just before contacting the target.
Precision pistol:
IF you have played as Princess Leia, you know what her sniper pistol is like. The precision pistol is exactly the same. It is a more powerful impact and you can snipe with it.
Vehicle regen:
This special power allows you to repair all vehicles you are in instead of just starfighters.
Space battle kills:
First, ensure that the enemies shields are down, then select a soldier with a blaster rifle. Take a fast ship and fly directly into the docks (it has a blue film over it), land, and get out. All of the enemies will be lightly armed because they are pilots. Open fire. Most will not return fire. Also, most enemy ship have an objective to destroy inside them.
Tank kills:
With a Vanguard, Heavy Trooper, Shock Trooper, place proximity mines on the tanks and any other kind of vehicle, except for the assault vehicles such as the AT-TE. A more difficult way is to use a sniper technique. Fire from a safe location. Target the vehicle, wait until the reticule turns red, then fire. Another useful bombardment unit is any that carry a recon droid. Their self-destruct mechanism makes them a formidable bombardment unit.
Linear Mode
