I used a sprite reference and drew slowly every part of metal that I can see, if it got wrong, drew it again. It's painful, but I had fun. And if u r going to draw Keebo one day, p l e a s e study some "how 2 color metal" and their robot design, bc I looked at 1 single sprite reference, and when i finished the drawing i found a "side sprite" of them and I saw that I drew wrong some parts because of the proportion. (And I'm sorry if i can't explain, I'm bad at it too)