A Weapon Balloon is a type of balloon in Diddy Kong Racing and its Nintendo DS remake, Diddy Kong Racing DS. As their name suggests, Weapon Balloons, when touched, grant the racers with items to attack their opponents or improve the racers' performance. Many Weapon Balloons appear in every course in the game. When touched, the balloons break and disappear for a short amount of time, but appear soon after for another player to grab.
Weapon Balloons come in five different colors: red, blue, yellow, green, and rainbow, and the type of item given by them depends on their color. For example, Green Balloons give the player an oil slick, while Blue Balloons give them a speed boost. Additionally, balloons of the same color can be hit multiple times to earn powered up versions of the items earned from them. However, if a balloon of a different color is hit, the weapon from this balloon replaces the previous item, downgrading it. In the DS version of the game, this is changed so that the previous item is not changed when a balloon of a different color is hit, and the balloon instead simply breaks.