Okay… this here is…
Mandat “Manny” Quinn was born a mutant, with sickly, waxy white skin and a pronounced hunchback. However he was also born with something else- the most highly functioning non-psychic brain on Earth. He enjoys his games of the mind, and can lead awry even the most dogged hero. His strength of intellect comes at a price though, for somewhere in his complex mind, there lies a flaw that turned the human Manny Quinn into the monstrous man known as… Mannequinn.
Golden Age Mannequinn: