Megatronus

Megatronus, otherwise known as The Fallen was an entity that, according to a human only known as "Villain Investigator", was just as vile as Unicron. When Vector Prime replied to his question, he brought up other creatures such as vile, if not more so, than Megatronus, such as (spelled "Tirac") and "Hori-Bull".

Appearances

 * Ask Vector Prime