List of Mario Party 9 minigames
There are a total of 44 Free-for-All minigames. These games can be played with two, three, or four players.
There are a total of ten 1-vs-Rivals minigames. They can be played with either four players, becoming 1-vs-3 minigames, or three players, becoming 1-vs-2 minigames.
Bowser Jr. Minigames
There are a total of ten Bowser Jr. Minigames. All of them involve two players only.
There are a total of 14 Boss Minigames. They can be played with two, three, or four players. The amount of health that each boss will have is dependent on how many players are playing; if four players participate, the boss will have more health than if only two players participate.
Note: Diddy's Banana Blast and DK's Banana Bonus are not actually boss minigames, since they do not appear in Boss Rush. They are categorized under boss minigames in Free Play, however.
These minigames can only be played in Extra Mode. The amount of players that can participate can vary for each minigame.