Gabyoall (ガビョール Gabyōru?), also known as Gabyool and Spine, is a low-lying, spinning security robot that travels back and forth on a surface to obstruct intruders. They mostly appear on floors and platforms, sometimes speeding up when the player is on the same floor, but there are also varieties that occupy ceilings and walls. Some can only be destroyed with certain such as the Rolling Cutter, the Ring Boomerang or the Power Adapter; however, others are invincible to all weapons. Its name may be derived from the Japanese word "gabyou", which means thumbtack. __TOC__