Super Duel Mode

Super Duel Mode is a side game mode in Mario Party 5, hosted by Skolar. It is a one-on-one battle mode in which two players face off against each other using custom-assembled vehicles (called "machines"). In this mode, one buys machine parts using points received by playing minigames in either Party or Mini-Game Mode and builds a battle machine to use in different tournaments or against friends. There are a total of 44 different parts that can be used to customize a machine. To unlock all the different parts, one must play all the tournaments and beat certain opponents.

Garage areas
The following areas are available in Super Duel Mode's initial segment, the Garage.

Playable characters
Playable characters do not have any noticeable differences except for the color on their steering wheel. Note: * indicates characters that are not available as playable, random characters in trial battles. If there is only one player who participates, however, the AI-controlled Koopa Kid is always the opponent.

Machine parts
A few machine parts have unique properties not stated in the in-game description. There are five symbols that indicate different aspects of the machine's ability:
 * Although the Skolar Body takes mostly the same amount of damage from machine attacks as any other body, the Skolar Body receives less damage from stage hazards.
 * Both Wiggler and Super Wiggler Tires allow the machine to rotate in place if the machine is stationary.
 * Spiny Tires do not slide on slippery terrain compared to other grounded tires.
 * The E. Gadd Jet and Lakitu Cloud hover slightly above the ground, meaning that hazardous terrain such as lava cannot damage the machine.
 * Red Heart: Health
 * Green Steering Wheel: Handling
 * White Boxing Glove: Power
 * Blue Vehicle Icon: Maximum Speed
 * Yellow Vehicle Icon: Acceleration

Body Types
These body types deal mostly with health units on a machine, although they can also modify speed.

Tires
Tires can modify speed, acceleration, and handling.

Engines
Engines shape largely how fast machines move and how well they handle. Engines are not visible during battle; however, a machine's running sound can differ when different engines are used with it.

Weapons
Weapons modify mainly the machine's attack stat. All weapons also have weight; heavier guns lower the machine's speed more than lighter guns.

Options
After the machine has been assembled player will be taken to Garage A-1 where players give it a name. After this, there are various options to improve the machine:

Super Duel battles
The player can choose the battle from the garage menu, but only Battle Competition on easy and normal are available at the start. If the player loses any game, the tournament ends and the player receives no trophies. On easy mode, the player faces mostly Koopa Kids and few other characters. In normal mode, there are more unique characters and less Koopa Kids. In hard mode, Koopa Kids are absent and Bowser and Donkey Kong appear in the competition.

In all competitions, there are obstacles, such as stationary Spiny Shells or Bob-ombs that detonate within a certain amount of time or upon contact. The size of a Bob-omb mirrors the damage it can do. Warp Pipes simply block machines. Mushrooms occasionally appear along the course and grant the machine better speed and control for a certain amount of time when collided with, as well as Poison Mushrooms, which hinder speed and control.

Terrain can vary in an arena called Random Ruckus. Dirt and grass are present and do no special effects. Metal and ice make the machines harder to control. Lava damages and pushes away the machine. Mud makes vehicles slower. However, if a machine is equipped with Lakitu Cloud or E. Gadd Jet tires, the machine does not get affected by any sort of terrain while Spiny Tires negate sliding.

CPU opponents and machines
All the CPU opponents also have nicknames for the final battle in a tournament.

Arenas
These arenas are playable only in Vs. matches. In D1 Tournament, the arena is always a variation of Random Ruckus. There are a total of eight arenas to battle in.