Dinger Derby

Dinger Derby is a 4-Player minigame in Mario Party 5 and Mario Party: The Top 100. It was also included as part of a Mario Party 5 demo found on a bonus disc bundled with preorder copies of Mario Kart: Double Dash!! The minigame's name is a variation of the real-life.

Introduction
The camera is zoomed in on one of the players, and zooms out as each of them takes a practice swing, then hits a baseball. In The Top 100, only the animation of players hitting a baseball is shown.

Gameplay
The players have 30 baseballs thrown at them by a pitching machine and must hit as many of them as possible. There are four types of pitches: a standard pitch, a fastball, a slowball, and a screwball that wobbles furiously. If two balls come toward the character, it counts as one ball, since the player can hit only one of those two. If the player manages to hit a ball at one of the spectators, the spectator will be dazed for a moment. The player who hits the most balls wins.

Decathlon
This minigame appears in the "Decathlon" modes in both games. It is the sixth minigame in Mario Party 5, and the first minigame in Mario Party: The Top 100 when only five minigames are played. Here, the player's objective is to hit as many balls as possible to earn as many points as possible, up to 1,000. In both games, a player can get 1,000 if they can hit all 30 balls. The default record for this minigame in Mini-Game Decathlon is 17 points (10 in The Top 100).

Mario Party: The Top 100's scoring system
Players earn ~47.368 points times the number of balls hit for the first 19 balls; after 19 balls, the player will score 900 points plus another ~9.091 points for each additional hit. Decimals are rounded down.

The scoring in Mario Party: The Top 100 is much more lenient. A result of 20 gives the player 909 points; the same result in Mario Party 5 gives the player only 500 points.

Ending
The camera changes angle and the bats disappear. The players then perform their victory/losing animations as the crowd cheers and confetti and balloons appear to commend the winner's/winners' success. If any player manages to hit all 30 balls, a hot air balloon with a big number 30 on it will appear. There is no ending in The Top 100; the screen fades to white before the results are shown. This is also true of the Mini-Game Decathlon variation in both games.

Mario Party 5

 * – Swing

Mario Party: The Top 100

 * Swing

Mario Party 5

 * Rules – "Swing the baseball bat and hit the pitches from the pitching machine. Whoever hits the most pitches wins."
 * Advice – "Try watching the speed of the arm to predict the speed of the pitch."

Mario Party: The Top 100

 * Description – "Swing at just the right moment to hit the machine's pitches!"
 * On-screen – "Swing at the right time to hit the pitches!"

Trivia

 * Daisy's artwork for this minigame in Mario Party 5 is similar to another baseball-based minigame from Mario Party 3, Hey, Batter, Batter!