The Handheld version of LEGO Star Wars was released for the Game Boy Advance on the 22 April 2005 alongside the PS2, PC and XBox versions. The game's premise is the same as the Console counterpart. You play through the Star Wars Prequel Trilogy as characters from the films.
The Handheld version is very different though. Because the game is on the GBA, it is played from a top down perspective. You only have 1 character on screen at a time, and the game has no multiplayer. It is also extremely cut down. With each Episode having less levels than it's console counterpart.