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On battle sprite color limits:
I think we should have the limit as a guideline to stick to gen4/5 Pokemon's "cell-shaded" style and look more authentic.
But then there's color limit issues that mostly stem from the design going into a sprite (as opposed to spriters using a bunch of colors just because) like the rainbow penis and Flairees where the limit could be changed slightly if shortcuts don't work out.
That means nothing like an actual photo for Borealis or space Quetz's aura/stars, but if a sprite absolutely has to go over 1 or 2 because there's no good alternative it's not the end of the world.