He is actually supposed to be called The Jabberwock, and is based on a poem by Lewis Carroll called "Jabberwocky", which is part of the book, Through the Looking Glass.
The Jabberwocky, the Jub Jub Bird, and Bandersnatch are the evil minions, or rather, pets, of the Red Queen. Prior to the plot of the movie, the Red Queen sent her army, along with the powerful Jabberwocky and The Knave Of Hearts, to destroy the party held by the White Queen and her subjects. This allowed the Red Queen to not only gain the crown and control of the land but secure the Vorpal Sword (the only thing that can harm or kill the Jabberwocky). The Jabberwocky is referenced throughout the film, but does not appear until the Frabjous Day, in which it was sent by its mistress to fight Alice during the war. The battle between the two lasted until the two reached the last tower on the battlefield and the Jabberwocky met defeat when Alice beheaded the beast, with Alice saying "Off with your head!" With the creature dead, the Red Queen's soldiers immediately lay down their arms, as without the Jabberwocky to enforce her demands, they no longer fear what she may do to them. The Jabberwocky's blood was then used by the White Queen to transport Alice back to London.
The Jabberwocky is the boss in the level Inside the Red Castle, which is in the Alice in Wonderland World.
- The Jabberwocky of the 2010 film is extremely similar to its book counterpart, differing only in color and certain aspects of its abilities.
- Unlike the Jabberwock of the novel, the Jabberwocky of the film seems to be composed of dark magic, as wisps of black smoke emanate from its body and wings. It also uses purple lightning as a breath weapon, which the novel version was not known for.