Older work of my trainer's rescued Charizard, Aiden

He was given various tests and drugs since egg stage in a Team Rocket Lab, which resulted in a forced shiny hatch, enlarged (totem) size, complete lack of socialization which led to hyper-aggression, and his unnatural quadrupedal stance. He's unfit for battle or interaction with other pokemon/trainers, and it took nearly a decade of work with him to gain his trust with Ley.