His family and friends would be devastated. They would try to find a way to bring him back to the good side. His parents might think it's some new ghost - related problem that they need to solve. Sam and Tucker would feel guilty, thinking they could have done something to prevent it. And they would be in danger from Danny's new evil self. Also, the other friendly ghosts like Jazz would be conflicted, not wanting to fight Danny but also not being able to let him continue his evil ways.
The town would be in chaos. Danny has been protecting it from ghosts, so if he turned evil, he could start to let the ghosts run wild or even team up with them to cause destruction. Buildings would be damaged, and people would be living in fear.
Let's say Danny turns into an Eevee. His adaptable nature would be taken to a new level. Eevee can evolve in many different ways, and Danny would likely be constantly thinking about his potential evolution. His personality would become more flexible, able to fit into different Pokemon groups easily. He would be more open to new experiences and relationships, and his inquisitive side would grow. He might start to see the world from a different perspective, as an Eevee has a different way of interacting with the environment compared to being a half - ghost.
However, there could also be a glimmer of the old relationship. Maybe deep down, Evil Danny still has some feelings for Sam, and she tries to use that to her advantage. But it's a dangerous game, as Evil Danny could easily turn on her. This complex mix of emotions and power dynamics would make their relationship very different from what it was when Danny was good.
The plot could change in terms of her love interests. Instead of the typical male - led romantic arcs, there could be new female - centered ones. For example, she might have a different type of relationship with a male character, where she takes the lead more often.
His life would become more structured. Batman is known for his strict discipline, so Danny would have to follow a routine. He'd also get better training for combat.
Well, at first, their relationship was more of an enemy - turned - something - else situation. Once married, they would be more protective of each other. Danny, who was always the hero, would now have Ember as his equal partner. Ember, who was once a bit of a troublemaker, would become more of a support for Danny. Their relationship would also be more public, and they would have to face the opinions of others, which would change how they interact with the outside world and with each other.
One common theme is the struggle between good and evil within Danny. It often shows how his normal self battles his evil side. Another theme is the impact on his relationships. His friends and family have to deal with this new, dangerous Danny.
One interesting Danny Phantom Danny Evil fanfiction could be 'The Dark Turn'. In it, Danny's evil side really takes over and he starts to cause chaos in the town. It shows a different side of his character and how the relationships with his friends and family change as a result.
Danny's relationships change drastically. He distances himself from his friends and family. He no longer values their opinions or support. Instead, he might see them as obstacles or even threats. His friendships with Sam and Tucker are strained as he starts to engage in activities that they find morally wrong, like using excessive force on other ghosts or humans who get in his way.
Danny would probably be heartbroken. He really cares about Sam, so finding out she cheated would be a huge blow. He might go into a state of denial at first, not wanting to believe it.
He might become more noble. Archangels are often seen as noble and pure beings, so Danny could take on these traits. His sense of justice could become more absolute.