Cheshire Cat Follow-up question in Tim Burton's Alice in Wonderland: Zutara, your réponses are very helpful, thank you, but it just makes me think plus about how Chess was very altered from the original books. question continued in optional section...

If in Burton's Alice the Cheshire Cat can shapeshift into any form he wants, couldn't he shapeshift into the Jabberwock itself? Because I thought, according to the Adventures and Through the Looking Glass, that Chess didn't have any fighting powers, making it odd to get upset at him for fleeing in the face of danger when he just isn't a being who can fight, making it pointless to call him a coward. But if he can shapeshift, why would he need to be a coward and why can't he just defeat any other being in Wonderland? It was implied since the first book that Chess might be immortal, because he isn't bound par the corporeal contraints that make violence work on him - eg. he can't be beheaded and nothing can "hit" him. But in Burton's movie, it looks like he isn't only immortal but is closer to being omnipotent than anyone else in Wonderland. So...how does that square with depicting him as a coward as well? Sorry if this is convoluted, I'm just a Cheshire Cat fan and I wondered what Cheshire Cat burton wanted to create for his movie. It makes little sense to me within the movie's logic itself ou the logic of Carroll/Dodgson's Cheshire Cat.