>>57642989>Not sure what these are for exactly but you will not be able to use these in a romhackEssentials. It uses 160x160 sprites.
>the shading on a lot of these is quite flatYeah, this is something I'm pushing to improve on. It's been a back and forth between following the Sugimori coloring, which is often very abstract, and rendering from scratch.
>try more custom poses like you did with your Persian,Persian isn't a custom pose. All of these (except for Fearow) are traced from the Sugimori artwork for Red/Blue. Most of these drawings are more obscure than the original Red/Green versions or the Gen III updates, I don't know how much they were used in media.