High Quality Content by WIKIPEDIA articles! In some works of science fiction (and, more rarely, fantasy), mecha, giant robots, meka, or mechs are piloted or remote-controlled limbed vehicles. They are generally, though not necessarily, bipedal. The distinction between low-end mecha and their smaller cousins, the powered armor suits, is blurred; in general, anything large enough to have a cockpit where the pilot is seated is usually considered a mecha.