All balloons are blue Code: ROCKETFUEL
Be the Same Character Code: DOUBLEVISION (two players can select the same character)
Huge Characters Code: ARNOLD
Keep the Speed Code: OFFROAD gives you the same speed on all surfaces
Maximum Item Powerup Code: FREEFORALL
Music Test Code: JUKEBOX (Check under Audio Options)
No Zippers Code: ZAPTHEZIPPERS
Play as TT-TT is a playable character in Diddy Kong Racing. But Rare really makes you work for it. You have to beat all of the tracks in the game in Time Challenge to get him. He will then appear as a playable on the character select screen.
Tiny Players Code: TEENYWEENIES
Credits screen-Enter this cheat in the magic code screen to see the credits. Code: WHODIDTHIS
Extreme Opponents Enter TIMETOLOSE at the magic codes screen and players can battle it out against opponents possessing extremely hard AI.(100% pointless)
Adventure Two (Mirror Courses)-To access Adventure Two, you need to beat Wizpig in Future Funland and in the Overworld, get the TT and Wizpig amulets, and get golds in all four Trophy races. Adventure Two is the same full set of courses from Adventure One, except they're all mirrored.
Code Access-To access all of the codes, you need to beat entire adventure (one). After beating Wizpig (in either the first or second race), you'll open up the credits. Watch the credits cut-scenes at the end and before it finishes, a code, like "FreeFruit" will appear. Go to Options and enter them into the Magic Code List. Each time you beat Wizpig in either the first or second race, you will see a new code given. There are tons of them!
Free Fruit-By beating Wizpig the second time, and after watching the screen credits, at the end you'll see the password, "FreeFruit." Enter this in to start with 10 bananas.
Future Funland-To access Future Funland, the fifth world, you must place first in all of the Trophy Races and acquire the Wizpig Amulet. You don't need the TT amulet to access the fifth world, but once you're in Future Funland, you'll need it to race Wizpig again. Drive to the Trophy sign (near the Lighthouse) and park in front in of it to gain access. You will see your character enter into the lighthouse, which then turns into a rocketship and blasts off to space.
TT Amulet-To access the TT room in World 5, containing the second race with Wizpig, you need to get all of the TT keys in each of the four worlds. The keys are in located in Ancient Lake, Dino Domain; Snowball Valley, Snowflake Mountain; Crescent Island, Sherbet Island; and Boulder Canyon, Dragon Forest.
Wizpig Amulet To piece together the full Wizpig amulet, you must race and beat each of the four bosses twice.
All Balloons are Green Code: TOXICOFFENDER This code will turn all the balloons green
All Balloons are Rainbows Code: OPPOSITESATTRACT This code turns all balloons rainbow
All Balloons are Red Code: BOMBSAWAY Balloons are now exclusively red
All Balloons are Yellow Code: BODYARMOR Now all the balloons are yellow.
Bogus Bananas Code: BOGUSBANANAS reduce your speed...
Change Horn Sounds Code: BLABBERMOUTH This code will change the horn sounds in the game
Computer Can't Use Weapons Code: BYEBYEBALLOONS This code keeps enemies from using weapons
No Bananas in Multiplayer Mode Code: NOYELLOWSTUFF
Play as Drumstick To play as Drumstick find all of the amulets, the WizPig and the TT amulets. Once you've done this, squash a frog in the central area (place with the red spot).
Two-player Adventure Code: JOINTVENTURE Play the adventure with two players
Unlimited Bananas Code: VITAMINB Players now have unlimited bananas at their disposal
Turbo Start-As in so many N64 racing games, Diddy's got a Turbo Start (like Wave Race, Mario Kart 64). Just after the high-voiced announcer says "Get Ready" and the words start to fade, press the acclereration button (A). You'll get a mighty boost. The boost is more powerful and lasts longer the later you enact it. But be careful not to start it too late or it won't work at all.