It depends on your perspective. Some parts of the Pokemon manga have elements that could be seen as dark, like serious conflicts or character struggles.
Maybe. If the 'pokemon dark cry story' aims to create a distinct narrative, it would make sense to introduce unique Pokemon. These could be Pokemon that have been corrupted by a dark force and thus have different characteristics. Their color schemes might be darker, and their behavior more aggressive. They could also have a connection to a certain location in the story where the dark cry is more prevalent, and only they can survive or thrive in such an environment.
The Dark Knight in A Realm Reborn has a story filled with mystery and power. They are often seen as a figure of both fear and justice. Their journey involves battles against various dark forces, and they use their unique skills and abilities to protect the realm.
In a 'pokemon dark story', it could be that there is a hidden, malevolent force within the pokemon universe that is slowly influencing trainers and pokemon alike. This force might cause pokemon to turn on their trainers or make trainers become overly greedy and power - hungry. There could be a hero or a group of heroes who start to notice these strange happenings and set out on a journey to uncover the truth and stop this dark influence before it's too late.
In Pokemon Dark Rising 2 story, the plot thickens from the first installment. There are new types of Pokemon with special abilities that are either being misused by the villains or need to be rescued. The protagonist must form a strong team of Pokemon, make strategic decisions in battles, and also uncover secrets about the dark forces that are emerging. It's a journey full of twists and turns as the character battles not only against the obvious foes but also against the growing darkness within the Pokemon world.
I'm not entirely sure as it might be a fan - made or less - known Pokemon story. But generally, it could involve some sort of dark adventure in the Pokemon world, perhaps with new and menacing Pokemon or villains.