Successfully complete the game on level 5.
Unlock Nick, then play the last three holes again.
Unlocking clubs, balls, and characters:
All the clubs and balls can be unlocked by successfully completing the world tour on difficulty level one (in options). You can also unlock only three of the characters in the level. For each increase in level, you have the ability to unlock two more characters. (i.e. by successfully completing world tour with the difficulty set at level four, you can unlock a total of nine characters.
Select world mode and begin game play in the final course. Play through hole 15 and save the game if you are currently winning. Complete the rest of the course and win to unlock another character and club. Reload the saved game and play holes 16, 17, and 18 again in first place to quickly unlock the next character and club.