To make the Battle of Coruscant easier, go to the diner and go up to the guy at the counter, got to codes and insert 4PR28U. This gives you invincibility. Press Start, go to Extra, and turn it on. Then go into Episode III ( to unlock Episode III and II you must finish atleast one level on Episode I ). Go to the first door. DONT FORGET TO PUT ON INVINCIBILITY! Go in, and bam! I'm pretty sure you won't explode, so it will make the Battle so much easier, because you have to be really good to not even explode ONCE on that Battle.