Directions:

Enter the codes while surfing.

No HUD:
Press Back, Up, Down, Left, Right, Up, Right.

Unlock Bonus Board:
Press Back, Up, Down, Left, Right, Left, Up.

Alternate colors:
Press Back, Up, Down, Left, Right, Down, Left.

Paddle faster:
Press Back, Up, Down, Left, Right, Down, Down.

Disco lights:
Press Back, Up, Down, Left, Right, Down, Right.

Cheat mode:
Press Back, Up, Up, Down, Down, Left, Left, Right, Right, Up, Left, Down, Right, Up, Up, Left.

Full special:
Press Back, Up, Down, Left, Right, Down, Up.

Surf on a shark:
Press Back, Up, Down, Left, Right, Right, Down.

Change view:
Press Back, Right, Left, Down, Up, L. Use analog-sticks to change view.

Easy floating:
Press Back, Up, Down, Left, Right, Right, Left.

Invisible board:
Press Back, Up, Down, Left, Right, Left, Up.

Invisible surfer:
Press Back, Up, Down, Left, Right, Left, Up.

Green surf:
Press Back, Up, Down, Left, Right, Up, Left.

Disable cheats:
Press Back, Back, Back, Back.