Jackhammer Rivals was a mini-game in the Stadium which took place during the Stadium Games. The objective of the game was to get as many players drilling on a specific color (either red, blue, green, or yellow). The Stadium's decorations color was changed according to the color with the most players drilling on it. When more than one color had the most players drilling on it, and specifically when no one was drilling, the color was unaffected. Players could drill using the red, yellow, orange, or green helmets.