Dark Star X is the sixth boss class located in The Gauntlet, which is inside the Challenge Node. To start, 2500 coins must be paid to battle Dark Star X. It fights along with Dark Satellmite X's. The bros. have up to 12 turns to destroy Dark Star X. If the player defeats it, he or she will unlock Class 7, where they will fight all previous classes, including the Dark Star X, and Bowser X. During the battle, Dark Star X is similar to the original Dark Star, only three times as tough and with a red and blue color scheme.