Happstablook is a ghost-like monster who possesses a cybernetic body built by Alphys, becoming a popular celebrity known as Mettaton. During Frisk's journey, Mettaton went along in antagonizing Frisk as part of Alphys's plan to assist the human, though they made amends. After multiple Resets, Mettaton and the rest of the monsters migrated to Meropos and began co-existing peacefully with humans, with Mettaton upgrading into a new, humanoid body called. His fame pursued throughout his time on the surface of Earth, and after learning of Alphys's death at the hands of Bête Noire, Mettaton sought out to stall the creature by battling against her with the aid of his Mettaton NEO body long enough for the Monster Royal Family's arrival. Following the victory against Bête, Mettaton took to live a peaceful life as a star, as he had always been.