Humpty Dumpty first appeared in the 2003 graphic novel Arkham Asylum: Living Hell and was created by Dan Slott and Ryan Sook.

[1] Humphry Dumpler is a hulking man with an egg-shaped head who speaks in rhyme and has a compulsive desire to "repair" that which he considers to be broken.

[2] He is a model prisoner at Arkham Asylum and is given various small projects to pass the time, such as repairing a broken mirror or fixing Ventriloquist's Scarface dummy.

[6] In the Batman: Battle for the Cowl storyline, Humpty Dumpty is recruited by Black Mask as part of a group of villains aiming to take over Gotham.

[7] In the Batman: Leviathan storyline, Humpty Dumpty masquerades as Santa Claus to bring stolen toys to the children residing at Rainbow House Shelter.