YKT-11 is an enemy in Final Fantasy X. It is an ancient machina built by Bevelle for use in the Machina War 1000 years ago and are now seen wandering the ruins of Zanarkand. If it is the last enemy standing, it will use Thrust Kick (that can also be learned by Kimahri), which ejects one character out of the battle, preventing them from gaining any AP and leaving only two party members left. So players should destroy this enemy first before attacking the other enemies. They will often appear with two Fallen Monks (flamethrowers), or with YAT-97.