Mettaton

Mettaton is a major character and the fourth boss in Undertale. Mettaton is a robot with a SOUL, whose body was built by Alphys. He is the sole television star of the Underground. Mettaton poses as an entertainment robot turned human killing robot in Hotland, though he later reveals the truth to the protagonist at the end of the CORE. Mettaton originally appears as a gray, largely rectangular box with a 4x5 grid of rectangular lights at the top, similar to the mechanism in Snowdin Forest used for Papyrus's Tile Puzzle. The grid of lights can change colors between red, yellow, green, and blue,...