To enter these codes go to the counter in Dexter's Diner and select the "Enter Code" option at the end.
These codes will unlock the characters for purchase, they do not give you them for free. There are no codes to unlock the characters that are given to you for free when playing the story.
Notably the only abilities that you cannot unlock through cheats are for opening Astromech and Protocol Droid Panels. You unlock a Protocol Droid after the very first level and can get an Astromech Droid from the first level of Episode II (which you can play immediately after the first level of Episode I).
The first two are as useful as the characters themselves as they are already unlocked by default.
|Battle Droid (Security)||KF999A||300|
|Battle Droid (Commander)||EN11K5||1,000|
|Battle Droid (Geonosis)||LK42U6||300|
|Super Battle Droid||XZNR21||5,000|
|Clone (Episode III)||ER33JN||600|
|Clone (Episode III, Pilot)||BHU72T||700|
|Clone (Episode III, Swamp)||N3T6P8||800|
|Clone (Episode III, Walker)||RS6E25||2,500|
|Mace Windu (Episode III)||MS952L||30,000|
Unlike the Character Codes the Extra Codes do give you the Extras for free. Don't forget to turn them on in the pause menu.
Most (but not all) playable characters have a bushy moustache appear on their face.
A flashing arrow points to each Minikit Canister in the current area, what counts as the same area is not always obvious, some rooms are counted while others are not.
For example in the beginning of the first level the two Protocol Droid door rooms are counted as the same area as the corridor so you can see the arrows from outside, but the Astromech Droid door room is counted as a different area and no arrows appear until you are actually inside.
Also be aware that the arrow points directly at where the Minikit will appear and does not show how to get to it or what you need to do to make it appear but it is still useful to know that you're in the right place.
The other limitation of the arrow is that if the Minikit is not within your screen's visual area you cannot see the arrow. Which means that if a Minikit is high up above you just out of view you won't be able to see the arrow for it unless you jump up and at that point you'll probably see the Minikit itself anyway.
Characters hold tea cups instead of weapons, the Brushes Extra overrides this for lightsabers but the Blaster Extras do not.
Lightsabers are brushes.
Blaster characters all wield larger blasters, only one Blaster Extra can be active at a time.
Blaster characters all wield classic style blasters, only one Blaster Extra can be active at a time.
Blaster characters all wield silly looking blasters, only one Blaster Extra can be active at a time.
You no longer take damage and do not lose studs if you fall off the edge or fail a timed section.
All characters and vehicles are completely solid black, even in cutscenes.
All lightsabers and Force glow effects are purple.