The Rider Synchro is a move that was performed by the ten veteran Kamen Riders. The technique involves all ten Kamen Riders standing in a circle and joining hands, channeling their power by synchronizing their belts into one swirling concentrated burst of energy. This was used to stop the effect of the space warp they were trapped in by Ambassador Darkness and defeat him. Birth of the 10th! Kamen Riders All Together!!