Step 11: Render the Joker's ear by darkening it and drawing a few extra curved lines within it to represent the inner structure.
Step 12: His hair can be a bit tricky, so this section about how to draw the Joker's hair is broken down in two parts. Start next to his ear and draw his sideburn. The line then goes in toward his forehead then out again toward the edge of the original oval. The line then goes in again toward the vertical construction line then curves out and over the oval. Draw a small curve on the right.
Step 13: Now draw the top of the Joker's hair, which starts on top of his ear then moves up to create two spikes. Then draw the hair line so it curves to the right and meets the line you previously drew to form another spike. Inside draw two lines that follow his hair shape to represent the sheen.
Step 14: Use the oval as a guide to finish drawing the shape of the Joker's face. Make his chin longer and pointier and draw a curved line below the Joker's mouth.
Step 15: That's it! You now have a nice sketch of the Joker from Batman: The Animated Series. 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.