Origin
Pentius is a Quintesson that Megatron encountered when he was marooned on Junkion. Pentius tells Megatron he can help him escape, but that Megatron could only survive on a place as monstrous as Junkion by becoming just as monstrous as it. When Megatron was attacked by the Terrorcons, he ripped out Pentius’ Spark and used it to repower himself to defeat the Terrorcons.
Creation
Pentius made his first appearance in the 2013 The Transformers: Monstrosity Digital Comic mini-series.