Sixknight

Sixknight is an Autobot in the Generation 1 continuity.

Masterforce cartoon
Initially Sixknight was a wandering Transformer who belonged to neither the Autobot or Decepticon faction. When he asked the Decepticons if he could join them, they told him he would have to defeat the Autobot Ginrai. Sixknight faced Ginrai in combat and lost. However, his defeat by the human forced him to re-evaluate himself and eventually side with the Autobots. He aided them once against the Decepticon Headmaster Juniors, and another time against Buster and Hydra while the Autobot Headmaster Juniors are trying to activate Godbomber without Super Ginrai. He died while fighting Black Zarak to allow God Ginrai to rescue their new ally Overlord near the end of the series.