This is a pencil test I shot about a year ago for school. It's not the best one I did, but it's my favourite. We had to animate a character jumping, and then skipping (I think the original idea was to have the character jumping rope, but there was a miscommunication and our class ended up doing this instead). Anyway, we had the option of either designing a character or using a pre-existing model sheet to work from, so naturally I picked Milton Knight's Robotnik design from Adventures of Sonic the Hedgehog.
At one point the teacher commented that it was too rubbery and stretch-and-squashy. He questioned whether it was "on-model," so I showed him the hilarious model sheet, which includes the legendary direction "Keep it loose and distorted. Draw EXPRESSIVELY, not WELL." This clearly bothered him, but he allowed me to continue with the animation. He eventually had me correct a few things and tone some of the stretch and squash down, but this is an earlier version that I like better. The biggest mistake that sticks out to me now is the popping of the stripe on his back during the skip. I should've just left that off.