Step #1
Start the work by drawing an oval, two curve lines & a rectangle.
Step #2
Draw outline for arms, hands, legs & feet.
Step #3
Make outline for ears & weapon. Also draw a curve line.
Step #4
Draw outline for eye brows, eyes, lips & nose.
Step #5
Draw outline for face & cap.
Step #6
Make shirt.
Step #7
Make hands, fingers & arms.
Step #8
Make pant.
Step #9
Make feet & legs.
Step #10
Draw ears & cap.
Step #11
Make retinas & moustache.
Step #12
Make weapon, rounded tiny shape over the forehead & edges of the shirt as shown. Also enhance ears and knees.
Step #13
Finally, make necessary improvements to finish.