As recently as a couple centuries ago, pink or "live" Corsola reefs were found in Galarian waters. But industrial runoff and global warming put an end to these reefs, as they did to many of the water pokemon found on Galar's coasts and other coastlines around the world. Unlike the many pokemon consigned to oblivion, however, the Galarian Corsola fought back.

Cursola have often been described as 'ecoterrorists', and have frankly done more to merit that title than the human groups, such as Team Aqua, which loosely share their goals. These pokemon are known for floating through the air to cut power lines with their spikes. They clog smokestacks with their own bodies in what would be a suicide attack for almost all living things, but Cursola are unharmed by the buildup of smog therein, because ghosts don't need to breathe. At worst, they project frightful illusions from their shells, trapping oil executives and wayward sailors in a nightmarish realm until they expire from hunger.

Yet for all their violence and destruction, Cursola are not without their share of human sympathizers. Technology is incredible, but not without its downside, and those who lost relatives to the Wyndon Great Smog can be forgiven for their rage – even if it left everyone relying on the family Pikachu or Yamper to light their homes and power their electronics. Many Cursola attacks were carried out at a considerable distance inland, and whether their perpetrators had accomplices or actual trainers remains an open controversy in Galarian historiography – along with fodder for an endless parade of conspiracy theories. The oceans are still warming, and one doubts if even a single Cursola's wrathful spirit has, as of yet, moved on from this world.