Copperhead was one of the most successful super heavyweight robots ever, and the most famous one owned by Team Omegaforce. While it didn't have any weapons, it made up for it with pushing power and armor. It was also very long-lived, participating in the first-ever custom fantasy league, but not winning a title until its final appearance in ARC Reckoning.
Copperhead has been retired, but was succeeded by Diamondback and Sidewinder.