Bonus racers:-  Select tournament mode. Win the first four tracks in first place to unlock a new racer.

In order to get more than the eight racers you start with, you must complete the Galactic Trials in tournament mode. For every race in the next two cups, one of the racers will be the "track favorite". Complete that race in first place (or second or third place several times) to unlock Clegg Holdfast through Sebulba. 

To unlock new racers easily, unlock all the tracks, then select versus mode and play as any racer. Defeat player two and then the race you did not get a racer on to unlock it. This is the best way to unlock Sebulba.

To unlock all characters, win every race in first place with any character.

Anakin (Episode 1):-  Get the fastest lap time for every track. 

Darth Maul:-  Get the top KO score for every track. 

Darth Vader:-  Unlock Anikin (Episode 1), Watto, and Darth Maul, then win tournament mode as one of those racers. 

Sebulba (Episode 1):-  Win first place in all three tournaments as Sebulba. 

Watto:-  Get in the fastest three lap times for every track. 

All tracks:-  Complete the tracks in tournament mode to unlock the corresponding track in the other game modes. 

Repair without losing speed:-  When you are racing and have damage, hold L2 + R2 to get repaired without losing speed.

Watto's bribes:-  After you get first place in a race in tournament mode, you can never race it again for money, and after you complete it the first time you can never get the full purse again. Since Watto's bribes amplify your winnings by a percentage, it is best to destroy as many other racers as possible the first time.

Art galleries:-  Upon completion of each of the three cups in tournament mode, an art gallery will become available. The Galactic Trials opens the Pod Racer Conceptual art gallery. The Podracing Open opens the Pilots art gallery. The Hutt Championship opens the Worlds and Arenas art gallery.

Serres Sarrano: Shortcut:-  There is a part of the track where it is mostly hot lava. When you find it, cross it and you will be closer to first place.

Boosts without engine burn:-  Play in versus mode and finish first. Your boosts will not do anything to your engines.

All tracks  -  Finish the tracks in tournament mode to unlock the corresponding track in the other game modes.

Repair Your Pod on the Fly  -  To repair your damage without slowing down your pod, press L2 and R2 during your run.

Unlock New Racer  -  To unlock a new racer, get a first place on the first four tracks of Tournament Mode.

Bonus racers  -  To unlock new racers easily, unlock all the tracks, then select versus mode and play with any racer. Defeat player two and then the race you did not get a racer on to unlock it. This is the best way to unlock Sebulba. To unlock all characters, win every race in first place with any character.

Race as Anakin in episode one  -  Get the fastest lap time for every track to unlock Anakin.

Race as Darth Maul  -  Get the top KO score for every track to unlock Darth Maul.

Art galleries  -  Upon completion of each of the three cups in tournament mode, an art gallery will become available. The Galactic Trials opens the Pod Racer Conceptual art gallery. The Podracing Open opens the Pilots art gallery. The Hutt Championship opens the Worlds and Arenas art gallery.

Repair without losing speed  -  When you are racing and have damage, hold L2 + R2 to get repaired without losing speed.

Watto's bribes  -  After you get first place in a race in tournament mode, you can never race it again for money, and after you complete it the first time you can never get the full purse again. Since Watto's bribes amplify your winnings by a percentage, it is best to destroy as many other racers as possible the first time.

Pit Stop Run In  -  If you take a hard ride on the first track - right before the finish line you'll warp to a pit stop and in there you will find the following pods: Dorment, Darth Maul, Watto, Darth Vader, Anakin and Sebulba.
Note: You need to take a hard ride like straight into it with turbo.

Race as Sebulba in episode one  -  Win first place in all three tournaments as Sebulba to unlock Sebulba

Game Shark Codes:-

Master Code (Must Be On):
0E3C7DF2 1853E59E
EEAF17C6 BCDACE32

Unlock Clegg Holdfast:
CE5D3F66 BCA99B84

Unlock Gasgano:
CE5D3F76 BCA99B84

Unlock Mawhonic:
CE5D3F7E BCA99B84

Unlock Knire Dark:
CE5D3F2A BCA99B84

Unlock Kraid Nemmeso:
CE5D3F36 BCA99B84

Unlock Wan Sandage:
CE5D3F12 BCA99B84

Unlock Mars Guo:
CE5D3F72 BCA99B84

Unlock Scorch Zanales:
CE5D3F1E BCA99B84

Unlock Tzidik Wrantojo:
CE5D3F32 BCA99B84

Unlock Sebulba:
CE5D3F1A BCA99B84

Unlock Sebulba (Episode 1):
CE5D3F0A BCA99B84

Unlock Darth Maul:
CE5D3F2E BCA99B84

Unlock Watto:
CE5D3F3E BCA99B84

Unlock Darth Vader:
CE5D3F3A BCA99B84

Unlock Anakin:
CE5D3F26 BCA99B84

Unlock Occo:
CE5D3F22 BCA99B84

Unlock Shrivel:
CE5D3F02 BCA99B84

Unlock Aldar:
CE5D3F7A BCA99B84

Unlock Ben:
CE5D3F5A BCA99B84

Unlock Dud:
CE5D3F62 BCA99B84

Unlock Ody:
CE5D3F06 BCA99B84

Unlock Teemto:
CE5D3F16 BCA99B84

Unlock Young Anakin:
CE5D3F5E BCA99B84