I'm afraid you do this sort of thing the hard way, FS. No picture base. I have the pedal but it's not like I modeled it to get it just right. Basically from memory and by sneaking peeks down on the floor. No posterization. You go at it pixel by pixel.
Basic shapes, basic palette made in advance:
Now, in regular art, most teachers can't stretch how important is to go from general to specific. In pixel art we piss on that concept and go for the detail right off:
More detail, dithering:
Detail. Detail. Smudges. Tinting. Headache:
Detail amost all in place. Sort of done with the pixel placement:
Anti-aliasing every little bit. Done otherwise.
Final palette. I never use simple lightness colour ramps. I like to tint stuff. Doesn't this look better than the step before it?
