In dueling if you give the computer Ben Kenobi and get his health down to literally none, then he himself will do the suicide and when you attack him he will disappear.

Enter on cheat menu

All levels:
Korriban

All area's:
Tantiveiv

All bonus stages:
Narshddaa

All characters:
Zabrak

All abilities:
Jaina

Unlimited force:
Kaiburr

Unlimited health:
Xucphra

Quick force heal:
Belsains

Big light saber:
Supersabers

Tiny droids:
071779

All movies:
Comlink

All art:
aaylasecura

Enter COMLINK as a cheat.

When you play as Ben Kenobi, press and hold L1, square, and circle. He will do what he did in Episode 4 right before Darth Vadar killed him

At the password screen enter supersabers

Unlock all story level.
KORRIBAN

Unlock all arenas
TANTIVEIV

Unlock all bonus stages
NARSHADDAA

Unlock Infinite force power
KAIBURR

Unlock Infinite Heath
XUCPHRA

Big saber

Here are all the secrets from mission one.
( 1 )After you help Obi-Wan move the starfighter,head back toward the screens bottom to pick up a health surge.( 2 )You run into it when Anakin jumps down into the landing grid.( 3 )After you destroy the sniper droids,force jump back down and head over to thelarge container in the upper left and destroy it to reveal a saber crystal.

When your fighting battle droids, the small tan kind, tap anikans force lightining once while holding them in the air and then throw them and then they will get up, start to freak out and shoot everywhere, then they will explode.

To unlcok all charecters Type in: ZABRAK

To unlock all levels type in: NARSHADDA

Code - effect
021282 - tiny droids
Supersabers - enemy's have giant sabers
AAYLASECURA - art stuff
Comlink - all movies
Zabrak - all duelists
Tantiveiv - all duel arena's
Narshaddaa - all bonus missions
Korriban - all story missions
Jaina - all saber moves and full force powers
Belsavis - quick force and health recovery
Kaiburr - Infinite force energy
Xucphra - Infinite health

Ps.it does not matter if you use small or big letters

TO unlock darth Anakin mode first you must beat the game.

Once you do that go to the title screen and put in L2,L2,Triangle,circle,square,L3,andR2.

Now restart the game on Darth Anakin mode and you will be invincible ohh and watch out for vader just keep force pushing him into the barrels he will die easier.