>>46147269There are actually some official character sheets which go in-depth on Mega design features. I wish we got more of them released to the public.
I love when Mega designs correspond to in-game performance. Swampert gets Swift Swim because it's body has organic propulsion features. Aggron's armor becomes thicker, which removes the Rock Typing and gives it the Filter ability for improved Defense stats. Kang fights alongside its child. And so on.