Thunderwing

Thunderwing was a mad Decepticon scientist who worked for Shockwave. Shortly after Darth Megatron was booted out of the Decepticon ranks, he was ordered by Shockwave to create a puppet Megatron until Shockwave could fully take control of the Decepticons. Thunderwing also created pretender technology but after a failed attempt to mix a cocktail of drugs into his pretender suit, he went crazy, devastated Nebulos, and was killed on Cybertron by the Wreckers.