Robo (ロボ "Robo") is a robot originally created to assist humans at the Proto Dome in Chrono Trigger. His real name is Prometheus (プロメテス "Purometesu") while his serial number is R-66Y. He uses his robotic arm as a weapon and although Spekkio cannot grant him the power to use magic (Spekkio being unable to properly read his character), Robo can use laser attacks that are similar to Shadow magic and bomb attacks that are similar to Fire magic. He also sports several healing techs. Along with his sturdy physique and high physical damage capabilities, he is the most versatile character in Chrono Trigger.
Chrono Trigger
Chrono Trigger is a role-playing video game developed and published by Square for the Super Nintendo Entertainment System in 1995 that began the Chrono series. Chrono Trigger's development team included three designers that Square dubbed the "Dream Team": Hironobu Sakaguchi, the creator of Square's successful Final Fantasy series; Yuji Horii, a freelance designer and creator of Enix's popular Dragon Quest series; and Akira Toriyama, a manga artist famed for his work with Dragon Quest and Dragon Ball. In addition, Kazuhiko Aoki produced the game, Masato Kato wrote most of the story, while composer Yasunori Mitsuda wrote most of the soundtrack before falling ill and deferring the remaining tracks to Final Fantasy series composer Nobuo Uematsu. The game's story follows a group of adventurers who travel through time to prevent a global catastrophe. Source: wikipedia