Spin Harmony was a dancing group formed by the ninja.
The ninja had formed Spin Harmony to replace The Royal Blacksmiths in a talent competition so they could win the Blade Cup—a trophy that held the second Fangblade. Though they originally intended to sing (under Lou's influence), just before they went on stage it was decided that they would do what they do best.
The group soon ditched their "barber's quartet" outfits for their ZX suits, beginning to dance along to "The Weekend Whip." The Serpentine tried to interfere with their performance, but the ninja's Spinjitzu and cooperative fighting only made it more exciting to watch. Cole finished the performance by performing the Triple Tiger Sashay, which encouraged the judges to give a perfect score of 30, beating the Serpentine Folk Band, Treble Makers which had 28 points, for the song "My Poison Lies Over the Ocean".