Not sure anyone else has carved funkins... I've done two and I hated it so much I haven't done any more. I'd answer your question about shading, but I tend to not like that style either...
Though, I do have some experience designing patterns... I can give you some tips and a starting-off place, but I can't help with the actual drawing due to a lack of time.
First thing I'd do is find a coloringbook page of Gobber. I'm not sure what pose you were going to use, but here's a link to a colorbook page of him I found:http://www.zonaecoloring.com/Cartoon%20Characters/How%20to%20Train%20Your%20Dragon/gobber.jpg
For other Gobber-like poses, try this link, which has some character concept art for the film: http://benbalistreri.blogspot.com/2010/10/legend-of-boneknapper-on-dvd-today.html
What you might try doing to help you make your pattern quickly is, first, print it out. Then, color the drawing with 3 different colors. Have one color be cuts all-the-way through. Have one be cuts that go part-way-through. The third color should be parts that remain.
... then, maybe, as a test run, cut out the portions of the paper that are "cut all-the-way through" to see if there are any "floppy" portions of your pattern or areas that would not be sturdy enough. Fix those areas and then carve in your funkin.