Play as T.T.

To play as T.T., you must race each course in the Time Trial mode until T.T. comes out to challenge you, and he won't appear until the pre-programmed track record in a particular track is beaten by a large margin. When he challenges you, you must defeat him in a race on that course. Once you do beat him, a small T.T. symbol will appear on that particular track. You must beat him on all tracks to get him as a playable character.

Contributed by: KasketDarkfyre 

Gain lots of speed very quickly while flying

In races where you're in the plane, if you hold left or right without holding A then double tap R, you will do a loop in the air. During this, you will gain a lot of speed (maxing out the speedometer if you chain several of them together), as long as you aren't holding A. This can be used to cover large, mostly straight/empty stretches of levels very quickly by doing this over and over again. It makes beating T.T. on any flying level much easier.

Contributed by: NCloud 

Go faster in the car

There is a way to remove the speed limit of 60 MPH. Rapidly press the gas button, and you will build up speed to about 90 regardless of the character. Note: This only works with the car.

Contributed by: TeknoBlade 

Do a 180º turn on the spot

While backing up in the car, push the control stick at an angle left or right and hit R.

Contributed by: nintendo2guy 

Adventure 2

Get the four original trophies, to unlock the secret world. In this world, get all the baloons, and the final trophy. (Giving you 47 baloons, and 5 trophies). Take on Wizpig (the one in the fifth world, future fun land).

When you win, you'll unlock the ''Adventure Two'' option. In this mode, you collect silver colored baloons, and all the courses are mirrored. In addition, you can now choose to play a course in ''Adventure'' or ''Adventure 2'' mode, in the track mode.

Contributed by: German Dragon 

Developer's Times

Defeat Wizpig for the second time. After the ending and credits, a series of times will be listed. These times are the best times recorded (in Time Trial mode) by Nintendo and Rare staff during the production of the game.

Contributed by: josher1212 

Make more out of zippers

Just before you run over a zipper let go of the A button. Instead of a small boost (the same as one blue ballon) you will get a huge boost (the same as 3 balloons).

Contributed by: Pyro_Vesten 

Find The Fifth Secret World

First, collect all the amulets and trophies. Next, go to the front of the lighthouse and honk at it. It will then transform into a rocket, which can take you to the space world.

Contributed by: YSF 

Misc. Cheats

Enter these on the cheat menu, then go to the code list and turn them on:

Contributed by: wallywest80, Pyro_Vesten, _M_Williams_ 

T.T. Challenges

In 4 of the 5 worlds, there is a T.T. Challenge that can be unlocked by finding a key on a course in that world. Beating these Challenges will earn you pieces of the T.T. Amulet. Once unlocked, you can also play these in "Tracks" Mode.

Contributed by: nintendo2guy 

Drumstick

Contributed by: ViperDiamond 

Wizpig Portrait In Log.

In the log, (Near where you start the game) is a picture of Wizpig. If you use your stylus to draw around the outline of the portrait, the wall will crumble and a small area will open up. In this area is a scratch card.

Contributed by: dady5000 

Unlock Coin Challenge for new levels (Thunder Cove, Meandering Mount, Splashdown Pass, & Strangled Shrine)

Get a Gold Rank on all Balloon Touch Challenges in Adventure to play Coin Challenge for the 4 brand new levels.
To play Coin Challenge Mirror for these levels get a Gold Rank on all Balloon Touch Challenges in Adventure 2.

Contributed by: JKiii 

Coconut tree coins

Some trees allow you to launch coconuts using the DS's touch screen. If you launch them at the wall they will create cracks in the wall, and for a short period of time coins will pop out of them.

Contributed by: Alastorr 

Unfreeze the balloon

In the ice area of the overworld map theres a balloon stuck in a block of ice. Using the DS's touch screen pad, you can slide it down into the water to unfreeze it, then follow it down the river to the beach where it melted to collect it.

Contributed by: Alastorr 

Answers to sand puzzle

Near the lighthouse, theres a location where you can use the stylus to draw puzzles in the sand. If you draw a balloon, you'll get a golden balloon. If you draw a pentagon, you'll get a scratch card. If you draw a coin (small circle shape) you can get 10 coins, but you can do this up to four times.

Contributed by: Alastorr 

Super Boost

Before landing on a zipper or using a blue balloon, let go of the acceleration button to get a much stronger longer lasting boost then normal

Contributed by: yosouf06 

Unlock Adventure 2

Complete everything in Adventure 1. After the second Wizpig race in space and the credits, you'll unlock Adventure 2

Contributed by: jokerz_13 

Unlock the Secret Characters

There are 4 hidden characters that can be unlocked

Contributed by: jokerz_13