Watch Series American Ninja Warrior Ninja vs Ninja Online for free at CouchTuner. Epic competition series “American Ninja Warrior: Ninja vs. Ninja” pits three-person athletic teams against one another on physically demanding, side-by-side obstacle courses that test endurance and speed. Hosted by comedian Matt Iseman and former NFL player Akbar Gbaja-Biamila, the show features even more challenging obstacles this season, incorporating speed, human agility, skill, and a whole new strategy of racing. The 16-part season of “ANW: Ninja vs. Ninja” features some of the biggest names from the prime-time “American Ninja Warrior” franchise competing together to become the ultimate champions.