Step 11: Give Stitch's mouth more shape and draw little smile lines at either end.
Step 12: Draw the rows of teeth inside of Stitch's mouth. The teeth are like triangles with rounded tops. Draw them overlapping each other somewhat and draw his tongue as a couple of curved lines.
Step 13: Use the initial lines as guides to draw Stitch's ears. Don’t forget to draw the piece that’s missing from each ear.
Step 14: Draw Stitch's head by using the circle as a guide. Draw a few curved lines on top to create his tuft of hair.
Step 15 (optional): You can give Stitch his antennae if you want to draw the alien version. To do this, just draw two thin lines on top of Stitch's head.