Maybe when you're doing the GSC era you could opt to make them a little less shiny? I mean you are only using Ken's work for shapes anyway, right? The shading is all you, just taking nods from the way they were originally shaded. It doesn't seem like it would be too much of a jump to change the shading on those GSC pokes since he pretty much highlighted all of them with white, which translates to way too shiny.
On that note, Girafarig would be cool..