New Costumes- While selecting your golfer at the character select screen press C-Left, C-Right, C-Up, C-Down.
Replay Hole- First you pause the game during the hole you want to replay then pick the save and quit option. Now select continue to tee off at the same hole.
Stop Swing- Press B immediately after pressing the A button to swing.
Get Left Handed Golfer- Press L while selecting your golfer at the character select screen.
Taunt Opponent- While your opponent is swinging press C-Left , C-Up, C-Down or C-Right to taunt.
Compliment Opponent- Use the D Pad in any direction during opponent's turn.
Get Donkey Kong- Get all 36 rings on all 6 courses.
New End Sequence- After finishing the game with any character, that character will be featured in the end sequence.
Be Luigi- Use Get Character Mode and defeat Luigi.
Be Yoshi- Use Get Character Mode and after unlocking Luigi, defeat Yoshi.
Be Sonny- Use Get Character Mode and after unlocking Yoshi, defeat Sonny.
Be Wario- Use Get Character Mode and after unlocking Sonny, defeat Wario.
Be Harry- Use Get Character Mode and after unlocking Wario, defeat Harry.
Be Mario- Use Get Character Mode and after unlocking Harry, defeat Mario.
Be Bowser- Use Get Character Mode and after unlocking Mario, defeat Bowser.
Password Screen- At the main menu highlight the the option labeled club house and press Z + R + A at the same time.
Get Maple- Earn birdie badges on 50 different holes in tournament mode. To get a birdie badge, just get a birdie or better, and only one badge can be earned per hole.
Be Metal Mario- To unlock Metal Mario as a playable character, collect all 108 Birdie Badges from the six courses in the tournament mode. You can check to see which badges you have already won in a specific tournament by pausing the game WHILE PLAYING that tournament. Select "Score Card," and then view the second screen. This screen will show which holes you have one the birdie badges on for that course!!
Toad Highlands Tournament- Put in KPXWN9N3 as the password.
Get 1st Camp Hyrule Cup- Put in 0EQ561G2 as the password.
Get 2ND Camp Hyrule Cup Put in 5VW689O6 as the password.
Different Intro- After unlocking Donkey Kong put in any 8 characters for the password. Ignore the Invalid Password message. Go back to the Press Start screen at the main menu and wait until the intro plays and you will see Donkey Kong instead of Yoshi.
Get Mario Star Course- After unlocking 5 other courses in the game score at least 2200 points.
Hit Ball Faster & Futher- After hitting the ball, press B.
Hit the ball further- While you are lining up the courser hold Z & down on the joystick. You will hit the ball from underneath and your ball will go about twenty yards farther.
More Roll- After hitting ball and it lands press Z rapidly to get more role on the ball and make it go a few yards farther. Helps a lot when you just miss a green you can press Z and it will role farther on the green hopefully.
See Your Shot Again- To have a replay of your shot simply press the B button right before your shot is finished.