Goku, is the main protagonist of the Dragon Ball metaseries created by Akira Toriyama. He is the adoptive grandson of Grandpa Gohan, the husband of Chi-Chi, the father of Gohan and Goten, the grandfather of Pan and later the great-great-grandfather of Goku Jr. I've made a step by step lesson for you to learn how to draw Goku from DragonBall Z.
Sketch an oval shape head. Add facial details. Sketch overflowing lines for hi spiky hair. Illustrate his neck and shoulders. Make his costume. Outline your drawing. The next step on how to draw Goku from DragonBall Z is to color his hair black, flesh tone color for his face, and a combination of orange and blue for his costume. Add shadows on it.