Step 16: Thicken the guides for Marvin the Martian's little legs and tighten the oval shapes of his feet so that they curve more and are narrower near the top.
Step 17: Draw the details on Marvin the Martian's sneakers. Add a line at the bottom for his soles, and draw a series of lines inside each sneaker to represent his shoelaces. Draw circles near Marvin the Martian's ankles for extra detail.
Step 18: That's it! You now have a nice sketch of Marvin the Martian from the Looney Tunes cartoons. You can stop at this quick drawing for a rough, sketchy look or go for a more finished look by continuing to the step below.
Step 19: For a more finished, inked look, carefully draw over the final sketch lines with a pen or marker. Wait for the ink to dry, and then get rid of every pencil mark with an eraser. You now have a finished inked drawing of Marvin the Martian! You can stop here or go to the final step to complete your drawing of Marvin the Martian.
Final Step: For a completely finished Marvin the Martian drawing, you have to color it. You can use markers, color pencils or even crayons! Color the brush portion of his helmet yellow and the base a light brown. His face is black except for a small section above his brow. Marvin the Martian's helmet and skirt are green, and his shirt and detail on his shoes are red. That's it! You now have a completed drawing of Marvin the Martian from the Looney Tunes cartoons.