- Dolphin Shoals is the first (and currently only) Mario Kart course to start underwater.
- Krunch has four fingers in Diddy Kong Racing–for the remake, Diddy Kong Racing DS, his new appearance now has five fingers.
- The pyramids in the background of Shifting Sand Land are actually based on the Great Pyramid of Giza.
- Mario Party 4 is the last Mario Party game to feature multiple minigame tracks for when there is just one winner, multiple winners, and a new record.