Card Party is a side-game from Mario Party 5. It is very similar to Mario Party's main game, except it's in the form of a card game. Hosted by Mamar (in charge of Bonus Mode), this board is entirely made up of cards, with character game pieces instead of actual characters. The first thing that players do is choose the size of the board (7x7, 8x8, 9x9, or 10x10). Then, the game pieces is chosen (Mario, Luigi, Princess Peach, Yoshi, Wario, Princess Daisy, or Waluigi). Next, the order of play is chosen by picking cards numbered 1, 2, 3, and 4. The player that picks 1 is first, and so on. When this is done, players chose where to start on the board. Once the game started, each player rolled the dice (not Dice Block) and moved a certain number of spaces. As they went turning cards over, they could pick which direction they want to go. When a new card is turn over, it reveals a Path Card, Item Card, Event Card, Bowser Card, or Star Card.
 Path Cards
These cards simply opened a pathway for players to continue traveling. It where they chose which direction they want to go, depending on which way the path went. It was always best to head toward the Star cards, as the winner was determined by the number of Stars. Sometimes, another die is reveal from under a Path Card, letting the player roll it and adding the number rolled to the current number of spaces left.
 Item Cards
These cards gave useful items that can be use by pushing at the beginning of the player's turn. The items used are taken from the main game and have similar effects.
 Event Cards
These cards bring an unexpected event that can be good or bad.
 Bowser Card
 Star Cards
These all look the same from the top side, but once they are flipped over, there are four possibilities:
 Last Card Event
If one player is in fourth place when left only one card in game, one of those events can happen. Once the event is done, normal gameplay resumes.
At the end of the game, the player with the most Stars wins. If there was a tie, players will then have to play a tie-breaker game to determine the winner. Eight cards were placed facing down, and players take turns choosing cards until one player revealed the Star Card. This player was then declared the winner.