Joey was a dollmaker, a very good one at that. He had a whole crew to help him with it. Their business was prosperous, worth millions. But, as with many things, it came to an end. He slowly got into the puppet making business and here things took a hard turn south. As Joey's mental health declined, so did his business. He began hearing things, he became irrational, egotistical, and dangerously obsessive. He pushed everyone out of his life trying to help him. He yelled obscenities, nearly incomprehensible, nor very understandable.
This warranted the attention of the famous Mr. Flaky, who even he was rather concerned for the guy's mental health. He agreed to help him accomplish his dream of bring his work to life, he claimed often times he can hear his doll's and puppet's talking to him, edging them to help them, often times screaming it. Flaky agreed to doing this and brought most of them to life. But this would, unintentionally come at the cost of Joey's life.
Many of these dolls became malicious and troublemakers. Mortigus was one of them. He was the manifestation of many of Joey's worst memories, often caused by other people's. Through much of Joey's early life was spent in horrid conditions, either bullied by his classmate's for is obsession for dolls and puppets, to constantly getting yelled at by his parents for not being good enough. He was even fully neglected through quite a bit of his teen years.
The most notable memory that had still haunted him until his last day alive, was the one time he got arrested for a crime he never did. He was cursed to spend 18 years to life in prison but managed to get out at 15 years for very good behavior, but that things that happened to him while he was there... he'd swore to himself he'd die with that secret. Throughout his entire life past he'd always have been bitter of what happened, always wanting revenge
Well he'd get that revenge in the form of Mortigus. He is a spiteful and violent entity with nothing but hate in his heart, and all the painful memories he's acquired over the years.