Unlock everything:
     Enter CITYBEACONS as a code.

Always win:
     Enter TEAROUND as a code.

Infinite time:
     Enter IWISH as a code.

Power-up moves:
     Enter TRAVOLTA as a code.

Big head mode:
     Enter INFLATEDEGO as a code.

Unlock Combat board:
     Beat the boss on the U.K. track.

Unlock Speed board:
     Beat the boss on the U.S. track.

Unlock Trick board:
     Beat the boss on the Japan track.

Hints:

Fast start:
     Tap R three times during the starting countdown, when the numbers
3, 2, and 1 appear. Then hold R when the word "Go" appears.

Access Japan early:
     Enter the U.K. area that features a hill right before a wall that
locks  you  from  the area where Japan is located. In order to do this
trick,  you  must  hit the hill fast, jump from it, then do a spin. If
done  correctly  you  will  end  up jumping over the wall and into the
Japan area. Note: If Japan has not been unlocked normally, you will be
stuck in this area because none of the doors have opened.

Return to UK:
     The  following  trick can be used to return to the U.K. area from
the  Japan  area  when  the all the doors are locked (such as when the
"Access  Japan  early"  trick  is used). Get a good start and get some
speed. Board down to the ramp used on the time you jumped over and did
a  spin. If you get high enough, you can go over the fence back to the
U.K. area.

Break the glass at UK Races 1 and 2:
     You  will see a big clock In UK races 1 and 2. Towards the end of
the  course in race 1, go up the ramp and use a boogie drill or hammer
drill  to  break the glass and save some time. At the start of race 2,
go on the right side and get the speed boost. Break the glass by using
boogie drill or hammer drill to cut off a sharp turn.

Defeating the UK StuntBowl Boss:
     Just  stay  there when the starting countdown ends, then jump and
do  a  360 in the air. Repeat that. Make sure you do the move while in
the  air.  You  will  receive  500 points each time. Repeat this until
reaching 1500 points. You can also take your time to finish with about
30 seconds.

Special tricks:
     A  globe  that resembles a mini-sun is hidden in each level. Find
one  of  the  globes, and it will hover next to your board for a short
time.  Before  it  disappears  hold  the L and press B to execute your
rider's signature trick. Some signatures must be done in air.

Location of globe in Japan 1:
     There  is  a  globe  fairly close to the beginning of the Japan 1
level.  Once  you  go through the figure eight track in the beginning,
there is a section that goes up a wall and down the other side. If you
keep  to  the  right  and  do  not  go  up  the  wall,  you  can see a
loop-the-loop.  Go  straight and do not try and turn while in the loop
to  avoid falling. The globe is right at the top. Be careful, as other
trickers can take your globe by touching you.

Location of globe in UK race 1:
     Near  the  beginning of the race, when you jump up the staircase,
make sure you go the very left side and you'll find it.

Score high points:
     To  score  very  high  points, you firstly have to be high in the
air.  Then do a gyro trick (you have to score an 800 gyro) and then do
a  backflip,  a doubleflip and a tripleflip. OR you could keep doing a
handspin or a handflip to get a multiple of 3000 points each time!