Thrasher

Thrasher was the leader of the Decepticon Dinocons.Thrasher transforms into a pilosaurus.He was presumed dead soon before the launching Ark and the Nemesis.Thrasher hijacked an Autobot ship with Claw the 2nd in command of the Dinocons.When they were ready to launch some Autobots attacked the ship.They escaped and found their way to Earth to help Megatron defeat the Autobots.