Cheat mode:
Select "Options" at the main menu. Hold R2 and quickly press Up(2), Down(2), Left, Right, Left, Right, Square, Circle, Square, Circle at the options menu. The Cheat Name screen will appear to confirm correct code entry. Enter one of the following case-sensitive codes then press X to exit back to the options screen. You can now continue your game and see the effects of the cheat.

Cannot get knocked off:
Enter TopBird as a case-sensitive code. The CPU can no longer knock you off your SeaDoo, but you can still knock them off.

Hard tracks with normal AI settings:
Enter Hobble as a case-sensitive code.

Maximum performance meter:
Enter PMeterGo as a case-sensitive code. Note: If you miss a buoy you will stall with this code on.

All courses:
Enter Passport as a case-sensitive code. Note: This also unlocks Steve. Note: This also unlocks the Bermuda Triangle.

All characters:
Enter AllChar as a case-sensitive code. Note: This also unlocks Steve.

All wetsuits:
Ente LaPinata as a case-sensitive code.

Expert AI:
Ehter AllOutAI as a case-sensitive code. The AI will run the best race possible on all courses. Note: This is already active by default under the hard difficulty setting.

All ending FMV sequences:
Enter Festival as a case-sensitive code.

Play Time Trials against a UFO:
Enter IBelieve as a case-sensitive code.

Play Time Trials against a miniature F-18 jet:
Enter F18 as a case-sensitive code.

Play Time Trials against ghost of currently selected player:
Enter SEADOO as a case-sensitive code. Note: this is the default in the game.

Ending bonus:
Successfully complete the game under the hard difficulty setting to unlock Steve as a playable character and the Bermuda Triangle level.

Hidden track:
Collect 100 balloons in countdown mode.

Hint: See squid:
You can see the squid by turning right off the track immediately at the very start in freestyle mode. If you go out far enough, the squid will take you under and blast you back onto the track.

Play the Loch Ness track in career mode. When you reach the waterfall, hold down the nose of your jet ski so that you submerge. You will pop up in a cave on the other side of the waterfall. Once you reach the start of the course on the next lap, the squid will be waiting there.

Immediately at the start of any race (free ride mode recommended), go straight off the course and enter open water. The music will stop and the squid will grab you and throw you somewhere on the track.

Hint: Moves:

Level 1
Cordova: Press L2 + Up.
Lazy Boy: Press L2 + Down.
Heart Attack: Press L2 + Left.
Double Cancan: Press L2 + Right.
Spade: Press R1 + Up.
Rollover: Press R1 + Down.
Saran Wrap: Press R1 + Left.
Seat Surf: Press R1 + Right.
Handlebar Handstand: Press R2 + Up.
Superman: Press R2 + Down.
Nac Nac: Press R2 + Left.
Shin Grab: Press R2 + Right.

Level 2.
Air Walk: Press L2 + Up, Down, Up.
Cliffhanger: Press R2 + Down, Up, Down.
Rack: Press R2 + Up, Up, Down.
Whirlybird: Press R2 then rotate the Left Analog-stick counter-clockwise in a full circle starting at Up.
Metronome: Press R2 then rotate the Left Analog-stick counter-clockwise in a half circle starting at Left.
Roundhouse: Press R1 then rotate the Left Analog-stick counter-clockwise in a half circle starting at Right.
Tumbleweed: Press R1 + Down then rotate the Left Analog-stick counter-clockwise in a half circle starting at Up.
Doubledouble Cancan: Press R2 + Right, Left, Right.
Rear Handstand: Hold R1 + R2 and press Down, Up, Down.
Bicycle Kick: Press R2 + Right then rotate the Left Analog-stick counter-clockwise in a half circle starting at Left.
Kiss Of Death: Hold R1 + R2 then press Up, Down, Up.

Level 3.
Backflip Hold R1 + R2 and press Down(2).
Pommel Horse: Press R1 + Right, Left, then rotate the Left Analog-stick counter-clockwise in a full circle starting at Down.
Wu Ping Crane: Press R2 + Up, Down, then rotate the Left Analog-stick counter-clockwise in a full circle starting at Up.