Target Bullseye Tournament
Press [Start] + [Z] at the title screen to display the codes screen. Then, enter "CEUFPXJ1" as a code.
Hollywood Video Tournament
Press [Start] + [Z] at the title screen to display the codes screen. Then, enter "BJGQBULZ" as a code.
Mario Open Tournament
Press [Start] + [Z] at the title screen to display the codes screen. Then, enter "GGAA241H" as a code.
Bowser Jr.'s Jumbo Tournament
Press [Start] + [Z] at the title screen to display the codes screen. Then, enter "2GPL67PN" as a code.
Taunt
When in multi-player mode, press the [Up], [Down], [Left], or [Right] on the D-Pad during an opponent's turn to taunt them. There are four different taunts per character.
Compliments
When in multi-player mode, press [C-stick Up], [C-stick Down], [C-stick Left], or [C-stick Right] or the during an opponent's turn to compliment them. There are four different compliments per character.
Hole in one contest
Hold [Z] and press [Start] at the title screen to play a hole in one contest.
Cheep Cheep tournament
Finish the Lakitu Cup in first place.
Blooper Open tournament
Finish the Sands Classic tournament in first place.
Bowser Badlands tournament
Finish the Peach's Invitational tournament in first place.
Star Tournament
Finish the Bowser Badlands tournament in first place.
Play as Boo
Get 50 Best Badges in tournament mode.
Play as Petey Pirahna
Successfully complete putting, approach, and shot practice under all three difficulty settings in the Side Games.
Star characters
Play against that character in Character Match mode after being invited (getting an envelope) and win. A star usually adds something about 30 yards to your swing.
When you have unlocked the star mode of a character, they will automatically have a boost to their hits. However, if you press [R] while that character is highlighted at the selection screen, they will get a huge bonus to their hits at the cost of some of their control.
Intermediate and expert practice modes
Successfully complete novice mode in any practice to unlock the intermediate mode. Complete the intermediate mode to unlock expert mode. Note: In shot practice, expert is "Trouble Shot".
Control replay
Press [B] after the ball stops to immediately jump to the replay. To view it from another angle, watch the replay again. Press [A] for a faster replay.
Connection bonus
Use a link cable to connect to Mario Golf: Advance Tour on a Game Boy Advance. Neil and Ella can now be played in Mario Golf: Toadstool Tour with all the stats and abilities unlocked on the Game Boy Advance. Additionally, the further you are in RPG mode on Mario Golf: Advance Tour, the more bonus characters will be unlocked in Mario Golf: Toadstool Tour. Also, taunts that are customized in Mario Golf: Advance Tour will be transferred to the same character in Mario Golf: Toadstool Tour .