Transformers[edit] In the 1980s, Welker voiced many recurring characters in the original Transformers animated series. He voiced several Decepticons, including the leader Megatron, Soundwave, Skywarp, Mixmaster, Laserbeak, Buzzsaw, Rumble, Frenzy, Ravage and Ratbat, as well as Autobots Mirage, Trailbreaker and Sludge.