It reminds me of the original movies final fight with the sharptooth just with the others absent and Littlefoot taking the role of Cera. I like the shading and the overall style of the picture (the grim look of the Sharptooth in particular).
As for (hopefully) constructive criticism, I think that one would still see a bit more of Littlefoot's long neck even if it is somewhat compressed by his head charge I reckon it would still be visible (just a suggestion though).