This is a posable action figure from the Nendoroid series.
From Good Smile Company:
From Tim Burton's famous movie, "The Nightmare Before Christmas" comes a Nendoroid of Jack Skellington!
While maintaining his signature appearance, he's been brought down to Nendoroid size! He features multiple points of articulation in his arms and legs allowing you to easily recreate your favorite scenes from the film!
Jack's pet, the ghost dog Zero, is included along with a jack-o-lantern, present and more, allowing you to enjoy posing him in all kinds of situations!