Mario Golf: Toadstool Tour Cheat Codes for Gamecube

Unlock Bowser Badlands
Win the Peach's Invitational using Tournament Mode.

Unlock Cheep Cheep Falls
Win the Lakitu Cup using Tournament Mode.

Unlock Peach's Castle Grounds
Win the Blooper Open using Tournament Mode.

Unlock Shifting Sands
Win the Cheep Cheep Tournament using Tournament Mode.

Upgrade players
When you are playing character matches mode, accept the invitations and defeat the characters to get the upgraded stats version.

Change the weather
Go to save your game, then load it. Now when the course loads the weather will randomly be different.

Change pin location
If you want to change the location of your pin, just save the game then load it again.

Play as Boo
Get 50 best badges during Tournament mode.

Faster, different replays
When you've taken your shot, hit B to watch the instant replay. The viewing angle changes each time you watch the replay, and you can hit A to speed it up.

Play as Bowser Jr
Get all Ring mode stars, or finish Birdie challenge (win the front 9 holes of Congo Canopy, the back 9, then all 18 of them).

Player taunts
During a multiplayer game you can use the C-stick or press any button to perform taunts when it isn't your turn.

Play as Bowser Jr
Get all Ring mode stars, or finish Birdie challenge (win the front 9 holes of Congo Canopy, the back 9, then all 18 of them).

Play as Petey Piranha
Finish the Shooting, Approaching, and Putting games using all 3 difficulty levels.

Play as Shadow Mario
Earn a Best badge for each hole in Tournament mode.

Unlock Hollywood Video tournament
Hit Z + start at the title screen to bring up the contests menu. Now use the following code at the password tournament screen: BJGQBULZ

Unlock Peach's Castle Grounds
Win the Blooper Open using Tournament Mode.

Unlock Shifting Sands
Win the Cheep Cheep Tournament using Tournament Mode.

Unlock Blooper Bay
Win the Sands Classic using Tournament Mode.