Change your Outfits
When you're choosing your character, you can change the outfits by holding
one of the C-buttons.
Left-Hand Shooting
For a left-handed golfer, press the L button while you're choosing a
character.
Password Screen
To access the password screen, highlight the fourth menu option on the
main menu, then press and hold Z followed by R and A. The password
inserter will appear in the next menu.
Secret Characters for All Modes Mable (245 y): Get 50 Coins in the Tournament Mode and you can use her.
Donkey Kong (275 y): Get 30 stars at the Ring Shot Mode and you can use
him. Bowser (280 y): Beat him with any character after you've beaten Mario in
Comptuer Versus Mode.
Cheat codes from Bill's Cheat Pages http://www.angelfire.com/ca2/billscheats/