Highlight the "Clubhouse" option at the main menu, then press Z + R + A. Note: This does not work in the PAL version of the game.

Enter "KPXWN9N3" as a code at the "Code Entry" screen to play a tournament at the Koopa Cup course. Note: Another password will be displayed after completing the tournament. The ten character password is not actually a password for the game, but is for a promotion in Nintendo Power magazine.

Enter "0EQ561G2" as a code at the "Code Entry" screen to play a tournament at the Koopa Cup course with Donkey Kong.

Enter "5VW689O6" as a code at the "Code Entry" screen to play a tournament at the Toad Highlands course with Plum.

Collect at least 2200 course points after unlocking the five other courses in the game.

Successfully defeat Luigi in get character mode.

Unlock Luigi, then successfully defeat Yoshi in get character mode.

Unlock Yoshi, then successfully defeat Sonny in get character mode.

Unlock Sonny, then successfully defeat Wario in get character mode.

Unlock Wario, then successfully defeat Harry in get character mode.

Unlock Harry, then successfully defeat Mario in get character mode.

Unlock Mario, then successfully defeat Bowser in get character mode.

Collect thirty stars in ring mode.

Collect fifty birdie badges in tournament mode.

Collect all 108 birdie badges in tournament mode. -From: DJMpac4eva@aol.com

Unlock Metal Mario, then highlight him at the character selection screen, hold C-Left and press A.

The last four characters on the bottom row at the character selection screen can only be unlocked by using the Game Boy Color Mario Golf game and the Game Boy Transfer Pak that allows data to be shared between the two games. The four characters are Joe, Kid, Sherry, and Azalea.

At the character selection screen, hold C-Up, C-Left, C-Down, or C-Right while selecting a golfer.

At the character selection screen, hold L or Z while selecting a golfer.

At the character selection screen, hold R while selecting a golfer.

During an opponent's turn, press C-Up, C-Left, C-Down, or C-Right to say distracting comments to them.

During an opponent's turn, press Up, Left, Down, or Right on the D-Pad to say complements to them.

Pause the game during your turn on the hole to be replayed. Select the "Save And Quit" option to save the game. Then, select the "Continue" option from the main menu to tee off from the same hole.

Immediately after pressing A to swing at the ball, press B to cancel the swing, allowing you to start your swing all over again.

When the ball lands on the ground, repeatedly tap Z or A to move it a little bit further.