Star Wars Episode 1 Racer
Auto Pilot
Enable the "Unlock all cheats" code. Then while playing a game, press R + Z to activate auto pilot, where you only have to control the speed of your pod racer. Press R + Z to disable auto pilot and retain full control of your pod racer.

Unlock All Cheats
Select tournament mode, then choose an empty name entry. Hold Z and enter "RRTANGENT" as a name, while pressing L to enter each letter. Note: Ignore the fact that only three letters may be entered for your initials. After entering each letter, they should appear in the lower left corner of the screen. Then, highlight "End" and press L followed by B. Select the same file, then hold Z and enter "ABACUS" as a name, while pressing L to enter each letter. Then, highlight "End" and press L followed by A. Begin a race on any tournament track. Then, pause the game and press Up, Left, Down, Right to access the cheat menu. All options on the cheat menu will now be unlocked. Jinn Reeso and Cy Yunga will also be unlocked.
 Auto Pilot
 Unlock All Cheats
 Turbo Boost 2
 Player Voices
 Play As Darth Maul
 Show Credits
 Play As Cy Yunga
 Play As Jinn Reeso
 Debug Menu
 Sebulba's Pod Racer
 Turbo Boost
 Dual Control Mode
 Invincibility
 Mirror Mode
 Secret Player Taunts
Turbo Boost 2
Anytime while racing hold up on the analog stick (the circle above your speed has to be green.) then when that circle turns yellow press and hold A. NOTE this may and can overheat your ship unless you let go of the a button before the speed meter is all the way filled up.

Player Voices
To make a person talk during a race, just double tap the R button. They have a few different things to say, but they do get boring after a while.
Credit Goes To:sefhaltom via N64cc

Play As Darth Maul
Go to a new tournament and enter your name as DRTHMOL and hold R while entering your name. Let go of R after entering your name. Darth Maul will be in place of Anakin Skywalker. He will still look like Anakin Skywalker in the vehicle selection screen and all of his attributes will still LOOK the same but when you start a race you will be Darth Maul! Darth Maul's podracer's attributes will be full automatically.

Show Credits
This code allows players to view a photo of the team that designed this game. Take first place in all Tournament mode races, then activate the mirror courses in the Track Info Screen. When the Title Screen goes into demo mode, press Up-C.
Credit Goes To: Calvin Tsang via N64cc

Play As Cy Yunga
To play as Cy Yunga select an empty space in tournament mode and hold z while pressing L over each letter spelling out RRCYYUN. Then while still holding z highlight end and press L, then A.
NOTE: You must have Jinn Reeso to use this code.
Credit Goes To: James Trussler And Ken Anderson via IGN 64

Play As Jinn Reeso
Select an empty file, then press and hold the Z button while you scroll through the letters. Spell out the word "RRJINNRE" by holding Z and pressing the L button while over each letter. You should see the code spell out in the bottom left corner of the screen. When you are finished, hilight END and press L.
NOTE: This code only works AFTER you unlock Mars Guo.
Credit Goes To: Adam P. Leavelle

Debug Menu
Select tournament mode, then highlight an empty name entry. Hold Z and enter "RRDEBUG" as a name, while pressing L to enter each letter. Note: Ignore the fact that only three letters may be entered for your initials. After entering each letter, they should appear in the lower left corner of the screen. Then, select "End" and press L followed by A. Begin a race on any tournament track. Then, pause the game and press Up, Left, Down, Right to access the cheat menu. The debug option may now be enabled on the cheat menu.

Sebulba's Pod Racer
To get Sebulba's Pod to race with, all you have to do is win the last race, and he will be able to be selected!
Credit Goes To: Jeff Warshaw via N64cc

Turbo Boost
At the beginning of the race the announcer will say, "3... 2... 1!" Just before he says, "1!", push the analog stick UP and press A. If it worked your pilot will shout.
Credit Goes To: oNe via N64cc

Dual Control Mode
In order to unlock the game's dual control option, do the following: Select an empty game save (to erase, press C-Up), the hold the Z button while scrolling through the letters on the name entry screen. To enter a letter, hit the L Button. Enter the following word: RRDUAL.
When you're finished, select "End" and hit L again. Now enter your name the usual way. You now control the game with two analog sticks. Use controller ports #1 and #3, press forward on both sticks to drive and pull back to steer.
Credit Goes To: Gasgano's Foot via IGN 64

Invincibility
Select an empty game save (to erase, press C-Up), the hold the Z button while scrolling through the letters on the name entry screen. To enter a letter, hit the L Button. Enter the word: RRJABBA. When you're finished, select "End" and hit L again. Now enter your name the usual way.
Start a race and press START to pause it. Now press D-Pad left, down, right, up -- and you will be invincible.
Credit Goes To: Wesa did it! via IGN 64

Mirror Mode
Select an empty game save (to erase, press C-Up), the hold the Z button while scrolling through the letters on the name entry screen. To enter a letter, hit the L Button. Enter the word: RRTHEBEAST. When you're finished, select "End" and hit L again. Now enter your name the usual way.
Pause the race during gameplay and enter D-Pad left, down, right, up to activate mirror mode.
Credit Goes To: Trent's Beard via IGN 64

Secret Player Taunts
Want to see the racers taunt each other before the race? Simply hold down Z when you select "Start Race."
Credit Goes To: Yippeee! via IGN 64