I'VE CRACKED THE CODE!!! You can shade in the scratch costume editor. No ghost. No hacks. Just simple scratch logic, and some resizing. ENJOY! I call it "bitshade." If you don't know how to use gradient, press space for a tutorial, and keep pressing space.
Song is Shelter by Porter Robinson and Madeon (two people made it). I drew all the art. If somebody wants to use it... (shrugs) okay, just give cred. BY THE WAY: This strategy is not owned by me or anything. It's just something I figured out about scratch. Use out with cred, or without, I honestly am okay either way. :) Just maybe tag it bitshade? -