I've split your suggestion into it's own thread, as it was unrelated
Thanks for the idea!
Basically, we have every intention of doing this, it's just a matter of finding the time. Given we have 649 Pokémon to add images for, and all have shiny forms, some have alternate forms, etcetera, it would wind up as us trying to create probably not far off 1400 new images. So as you can imagine, it's a massive job!
We'll see what we can do, either way, but it will take a while.