This video shows you how to get the skull that is hidden in Bad Piggies Rise and Swine Level 2-35. The skull is located high above the finish line, and is very difficult to reach. Create a vertical contraption with a boxing glove aiming up at the piggy. Ride the low road all the way to the finish line, and prepare to fire the boxing glove. Timing is key as the contraption tilts, launching the piggy high into the cave above.
If you have a different strategy for completing this level feel free to leave a comment below.