Wakeboarding Unleashed
At the main menu, press X(4), B(4), Y(4), X, B, Y. If you entered the code correctly, a message will appear.
At the main menu, rotate the Right Analog-stick clockwise fifteen times. If you entered the code correctly, a message will appear.
At the main menu, press Up(2), Left(2), Right(2), Down(2), Up, Left, Right, Down, Up, Left, Right, Down. If you entered the code correctly, a message will appear. Alternately, complete the Florida and Delta Stage challenges to unlock the second and third wakeboards.
Successfully complete all levels to unlock the credits stage, a video of your character, and Summer, the first hidden character.
Make a perfect run during all the Star Search challenges (collect every possible star) to unlock Jordan, the second hidden character.
Successfully complete the game to unlock the FMV sequence for that character.