Unlock Darth Maul:
Beat the game with Qui-Gon Jinn and raise your skill level up to 100 then press select while the cursor is over Qui-Gon to access Darth Maul.
*Darth Maul is playable with all skills and can not learn any more!

Unlock Queen Amidala/Padmé:
Beat the game with Obi-Wan Kenobi and raise your skill level to 100 then press select while the cursor is over Obi-Wan to access Queen Amidala/Padmé.

Unlock Captain Panaka:
Beat the game with Plo Koon and raise your skill level to 100 then press select while the cursor is over Plo Koon to access Captain Panaka.

GameShark Codes

Infinite Health P1 800b240c0064

Infinite Force P1 800b24140064

Infinite Special P1 800b228c000a

Infinite Special P1 800b241a000a

Infinite Health P2 800b24280064

Infinite Force P2 800b24300064

Infinite Special P2 800b2116000a

Infinite Special P2 800b2436000a

Max Score P1 800b240805f5
800b240ae0ff

Have All Handmaidens 800b22b4000a

Infinite Jedi Jumps d409d0940020
8009d0940004

Press L1 and R1 for All Handmaidens/Pilot
d00b22b4000c
800b22b4000a

Infinite Health Anakin 800b247c0064

All Secret Levels Unlocked
800ad29c 000f