What are the common signs of Ash becoming evil after betrayal in fanfiction?

One common sign is a change in his attitude towards friends. He may become more distant and cold, not showing the same warmth and loyalty as before. Another sign could be his new approach to battles. Instead of fighting fair, he might start using dirty tricks. For example, in a Pokémon battle, he could intentionally harm the opposing Pokémon more severely than necessary.

One common theme is revenge. After being betrayed, Ash often seeks revenge on those who wronged him, which leads him down the path of evil.

In some fanfictions, Ash might become evil after betrayal when his trust is shattered. For example, if his friends turn on him for some false accusations, he could start to see the world in a different, more cynical way. This broken trust might lead him to believe that power is the only thing that matters, and he starts to pursue it without regard for the consequences, gradually turning evil.

One popular 'ash becomes evil after betrayal fanfiction' is 'Ash's Dark Descent' which explores how Ash's trust is shattered and he turns to the dark side. It has some really intense scenes where you can see his transformation.

Power and growth are also typical themes. Having Reshiram gives Ash new power, and he has to grow in order to handle it properly. The fanfics usually show how he learns to control Reshiram's power and how it affects his battles. For instance, he might face stronger opponents but with Reshiram, he has new strategies to overcome them. Also, the theme of trust is important. After the betrayal, Ash has to learn to trust again, this time with Reshiram, and the story often explores how this trust develops over time.

Another common theme is redemption. Even though he's evil, some fanfictions might explore the possibility of him changing or finding some sort of redemption for his actions. It adds an interesting layer to the character.

One common theme could be the loss of innocence. Ash has always had a somewhat naive view of the Pokemon world, and Mew's betrayal would shatter that. It would make him realize that not all Pokemon, even those seen as pure and good like Mew, can be trusted blindly. Another theme might be the power struggle. Mew is extremely powerful, and its betrayal could be part of a larger power play in the Pokemon world. Ash, as a relatively small - but determined - trainer, would have to find a way to deal with this power imbalance.

Power struggle can also be a theme. If Diantha betrays Ash for power, it shows how power can corrupt and change a person's values. It could also lead to a battle of wills between them, as Ash might try to oppose Diantha's new -found power - hungry ways. This theme often explores the darker side of human (or in this case, trainer) nature when faced with the allure of power.

"The Rebirth of the Princess Consort, the Prince is Overwhelmed" was a rebirth novel about the female lead being weak and giving everything to her beloved sister, who was eventually killed. I recommend this fairy's other novel,"The Reborn Daughter-in-law's Counterattack." The female protagonist was also weak in her previous life, bullied and controlled by others. However, after her rebirth, she made up her mind not to be passive anymore and worked hard to move forward, showing the spirit of counterattack. I hope you like my recommendation. Muah ~

Common elements would include an Ash character with a darker side, which is the 'evil' part. In a harem, there would be a group of characters, potentially of different personalities and backgrounds, all somehow connected to Ash. The 'lemon' aspect could bring in elements of attraction and desire. It might show through flirtatious dialogue, close physical encounters, or situations where the characters' relationships are on the verge of becoming more intimate, but not always in a full - on sexual way, as fanfiction has different levels of explicitness.