Sphere Factor

Sphere Factor is a 2-vs-2 mini-game in Mario Party 7. Monty Moles and Whomps appear in this mini-game. The point of the game is for each of the pairs to get to the other side of the place. They must push a giant ball around/through many obstacles. These include mini-mazes, Monty Moles, Whomps, and a particularly hard to get over bridge. If the ball falls off the bridge, it needs to pushed up a steep hill.

Trivia

 * This mini-game's name is a reference to the reality show Fear Factor.