Step 11: Now draw King Boo's body and head by using the original circle as a guide. Darken the line, but when you get to the lower left side, draw an extra curved line under the arm for the tail-like appendage.

Step 12: Now learn how to draw King Boo's crown. Draw the jewels on the crown using a couple of diamonds. Draw one diamond on the middle of the crown and another on the left side. Draw just an angled line on the right side. Part of that diamond isn't visible because of the perspective.

Step 13: Draw the rest of King Boo's crown using the initial shape as a guide. On the tips of each point on the crown, draw a small diamond-like shape for extra detail.

Step 14: That’s it! You now have a nice sketch of King Boo from Nintendo's Super Mario Bros. video games. 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 15: 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 King Boo! You can stop here or go to the final step to complete your king Boo drawing.

Final Step: For a completely finished King Boo drawing, you have to color it. You can use markers, color pencils or even crayons! Color the crown yellow and the jewels red and blue. The inside of King Boo's mouth is brown, and his tongue is red. You can leave King Boo white or you can add a bit of shadow using gray to make him appear rounder. Add the light gray mainly at the bottom of the body and some at the top and upper lip. That’s it! You now have a completed drawing of King Boo from Nintendo's Super Mario Bros. video games.