Get N Trophy
Finish the Roos Tubes level using time trial mode
Get Spyro the Dragon 2 Demo
At the main or new game screen hold L1 + R1 and press Down, Circle, Triangle, Right
New Battle Arenas
Use the arcade 1 player mode to finish the easy, medium and hard difficulty to get up to 4 new arenas.
Race as Ripper Roo
Hold down the L1 and R1 buttons at the title screen, then press Right, Circle, Circle, Down, Up, Down, Right.
CTR Token
In Adventure, when you are playing Crash Cove, go off of the ramp and push jump to turbo. Go through the water and it will bounce you up. Push jump again and make a right onto the bridge once you make it up, and you will get the letter. Don't go on that ship because it is a dead end.
Access Nitros Oxide?s Space Ship
To unlock the Nitros? spacecraft, you must possess four Boss Keys
Get scrapbook
If you beat N. Oxide's top scores in time trial you unlock scrapbook at the main menu.
Penta Penguin
At the Main Menu, hold L1 + R1 and press Down, Right, Triangle, Down, Left, Triangle, Up. If done correctly, you will hear a sound.
Invisibility
At the title screen hold L1 + R1 and press up(2x), down, right(2x), up. All non-computer characters are now invisible.
Scrapbook
At the title screen, hold L1 + R1 and press up(2x), down, right(2x), left, right, triangle, right. The "Scrapbook" is now an option at the main menu.
Climb up ramp walls
In that battle arena press R1 on a ramp wall then you'll be able to jump up a ramp instead of going up the ramp.
Get TNTs Off Your Head
When a TNT lands on your head press R1 repeatedly. If done correctly, the TNT will fall off in time. If you wait too long you will wipe out.
N. Tropy
At the title screen, hold L1 and R1. Press down, left, right, up, down, right, right. You should hear a sound, and now you may drive as N. Tropy.
Get Unlimited Bombs and Rockets etc.
First you need to get unlimited bombs by going to the main title screen and holding R1+L1, then press triangle, forward, down, forward, up, triangle, back. Then during a race, you will need to run over a red potion bottle, then you will lose your unlimited bombs. Next you will have to drive into a question mark box and whatever you get will be unlimited for that race.
Quick Draw
When you run into a question mark box, press the "O" button and your weapon will appear faster. You have to wait a little bit (about a second) to press the button. This code helps a lot in battle mode and could give you an edge.
Get Bonus Tracks Easier
At the title screen ( where you choose adventure, arcade, VS etc. ) hold L1 + R1 and press, right, right, left, triangle, right, down, down. You will hear a sound. This unlocks three battle arenas and one race track.
Pinstripe
At the title screen, hold L1+R1 then press Left, Right, Triangle, Down, Right, Down.
Komodo Joe
At the title screen, hold L1+R1 then press Down, Circle, Left, Left, Triangle, Right, Down. You should hear a sound and can drive as Komodo Joe.
Papu Papu
At the title screen, hold L1+R1 then press Left, Triangle, Right, Down, Right, Circle, Left, Left, Down. You should hear a sound and be able to drive as Papu Papu.
Infinite Wumpa Fruit
Hold L1 + R1 at the main menu and press down, right, right, down, down. You should then hear a sound confirming correct entry.
Infinite Masks
To get infinite masks, hold L1 + R1 at the main menu and press left, triangle, right, left, circle, right, down, down. If done correctly, you will hear a sound. As far as I know, this code does not work in adventure mode.
Final race against Oxide
Before you have to race against Oxide again you have to get all the time relics, luckily you don't have to get all of them as sapphire or gold or platinum. Anyways Oxide's race stratedgy will be the same so you can intercept it.