Start with a simple guideline consisting of circles and lines, and draw a rectangle for the gun.
Now we need to draw the cuffs around his shoes and gloves and a triangular shaped guideline for his chest hair. Remember the eyes on shadow and the eye on doom's eye.
Now draw the detail guidelines on his shoes, the muzzle thing and broaden out the limbs. Put the pointed tentacles on doom's eye aswell.
Put some fingers on shadow's hands and draw the chest hair in detail. Add the pupils to both characters and draw the designs on doom's eye. Draw the spikes on the back of shadow's head, and don't forget the detail to the gun, the shoes and shadow's tail.
Put the final detail into the shoes, eyes and tentacles to doom' eye and don't miss out the red stripes on shadow's head, the nose, the tongue to the shoes and gloves and the ears.
Draw over the correct lines in pen, rub out the pencil guidelines, and enjoy your picture!