This is The Riddler, AKA Edward Nigma. He commits crimes revolving around an obsession with riddles because of his deep inner need to prove that he's smarter and therefore better than others, which causes him to leave challenging clues behind in otherwise perfect crimes.
I drew it first with pencil in my sketchbook, then I scanned it in to my computer and colored it in Photoshop.
For the background I used a Rust texture by ~awjay (
) here: [link]