there is variety o pixel art; come down to style which you seek do
is it chibi ? smaller / ease
is it proportion / human proportionate ?
is it retro-based ? thus the shading use of darker colors for blending
is it dakimakura ? or maybe mix of many .
once art direction establish can refine the skill and excel
「ラストフェイトより、 ヴィンセント・フレーム傭兵 」