DC Universe Mini Mez-Itz Keychains - The Joker (A29) [Toy] The Joker from the second movie in Christopher Nolan's Batman movie trilogy, The Dark Knight , gets the Mini Mezi-Itz treatment! This Batman The Dark Knight Joker Mini Mez-Itz Vinyl Figure Key Chain features Heath Ledger's Joker in 2-inch vinyl mini-figure form. Not only does this vinyl mini-figure serve as a great display piece, but it's also a fully functional key chain, too! Features 5 points of articulation. Ages 8 and up.