Step 20: Use the lines and shapes in the middle as guide to draw Godzilla's body. Follow the path of the guides and darken the outer edges to create the shape of the body. Don't overlap the arm that's on this side of the body as you draw the shape of the body. As you darken the lines along the guides, make the shape bumpier for the rough skin. The body should be narrow at the top and wide at the bottom. Draw a line inside the shape to separate the top and bottom parts of Godzilla's body.
Step 21: Use the long lines on the left as guides to draw Godzilla's tail. Simply darken the lines to create the shape of this monster's tail. Draw a curved line close to the bottom edge of the tail to separate the skin tones.
Step 22: Draw a row of angled, pointy shapes along the back and tail for Godzilla's plate-like spikes. Each individual shape should be flat on the sides and jagged and spiky at the top. The shapes don't have to look exactly like this. Yours can be different. Just make sure they're jagged at the top. Make the spikes near the head and the tip of the tail smaller than the ones in the middle. The increase and decrease in size of this monster's spikes should be gradual.
Step 23: For a cleaner look, erase as much as you can of the initial guide lines. Don't worry about erasing all of the guides. It's okay to leave some behind. Re-draw any final sketch lines you may have accidentally erased.
Final Step: Add some shading to your Godzilla drawing to give the figure more dimension and volume. Pick the direction of the light source when shading so that the shadows are consistent with it. Shade lightly at first, and then gradually build up to the level of darkness that you like. Vary the pressure on your pencil to get different degrees of tonal value. For a more detailed guide on how to shade, check out this tutorial: How to shade.
Use a bit of rough shading on Godzilla's entire body to give the skin more texture. This type of shading consists of tiny scribbles to give the skin a rough texture. Use smoother strokes when shading the underside of the body and tail. Farther down the body, use longer strokes that contour to the shapes. Notice how the strokes wrap around the individual shapes like the arms and legs to give them a rounder look. As you shade, separate your strokes a bit so that the white of the paper comes through and creates a rough texture. If you make your strokes darker than your shadows, go back and add more value to your shadows. Shading can be time-consuming, so be patient and take breaks.
Add some shading to the spikes to give them more volume as well. Use separated strokes inside the spikes and make the tips darker. Add a cast shadow underneath. This helps to ground Godzilla so he doesn't appear to be floating. Don't forget to pause the video to draw at your own pace.