S.M.I.D.S.Y.

S.M.I.D.S.Y. (which stood for Sorry Mate I Didn't See You) was an invertible box shaped robot. Debuting in Series 3, it competed in every war since then. Its main weapon was a set of jaws on the front, which could either lift or grab, and a set of ramming spikes at the back. From Series 5 onwards, a horizontal spinning disc replaced the spikes. After this series, S.M.I.D.S.Y.'s jaw was replaced by a simple lifting scoop.

Although it never escaped the heats of a series, S.M.I.D.S.Y. was one of the most successful robots to compete, reaching the Heat Final three times out of five.