"[Spoiler] Why these new designs are so great"

https://ift.tt/36uOd45 Corsola and its evolved form Cursola are based off of bleached coral, a byproduct of global warming/pollution. Galar is an industrial region and probably pollutes a lot. The Crown-of-thorns starfish feeds on coral polyps, and also causes the structure to become white, which can be represented by Mareanie and Toxapex. Those two have already been confirmed to be in Galar. via /r/pokemon https://ift.tt/2WCkdPg