Lego Star Wars II Cheats for the GameCube

Invincibility:
Play Episode IV, Chapter 5 in free play mode. Use C-3P0 to unlock the first door, then use someone with force powers to assemble the fridge inside. When assembled, the fridge will open and drop a Super Red Power Block, allowing you to buy invincibility in the cantina for 900,000 studs.

Stud Fountain:
Collect 99 gold bricks.

Lego City:
Get 60 gold bricks and build the doorway outside.

Bounty Hunter missions:
Purchase all the bounty hunter characters (Boba Fett, Bossk, Dengar, Greedo, IG-88, and 4-LOM) to unlock these missions.

Minikit Detector:
In the Cloud City trap level, when you first start, look around the engines of your X-wing and pick up the red power brick.