Berserker

Berserker was a super evil and crazy Decepticon. He led the Bersrkers and left Cybertron with Darth Megatron.

Leaving Cybertron
Beserker was a Decepticon. He was part of the team that left Cybertron with Darth Megatron. He was a pro wrestler on Cybertron and beat up Grapple in the ring before hanging him outside.

Beserker hated Megatron and wanted him dead.