Big Head Mode:
During game play hold L and press B, A, B, Y, BACK.

Clubs:
Enter your name as release all clubs for all movies, characters, clubs and events.

Courses:
Enter your name as release all courses for all movies, characters, clubs and events.

Everything:
Enter your name as I Have No Time for everything.

Golfers:
Enter your name as release all golfers for all movies, characters, clubs and events.

Characters and Levels:
Beat Harley's final event on the tour to unlock Clem.
Beat Summer's final event on the tour to unlock Donna.
Beat Clem's final event on the tour to unlock Harvest.
Beat Ice Trey's final event on the tour to unlock ice ridge.
Beat Trixie's final event on the tour to unlock Killer Miller.
Beat Donna's final event on the tour to unlock Trixie.