Game Freak's alternate black-colored shiny Pokemon forms add depth and appeal, especially with signature creatures like ...

Known as the Pitch-Black Pokemon, Darkrai is a Mythical Dark-type ... the Paradox version's white hair glowed yellow and pink with electricity, and its entire body was covered in dark metal.

with those Pokemon also getting orange eyes, as opposed to the natural pink. The changes get even more prominent when Shiny Gardevoir Mega Evolves, with its white dress changing to black.