What could be the possible plotlines in 'ash is secretly elite four fanfiction'?

Well, there might be some. You could start by checking out some popular fanfiction websites. Some might have really creative takes on Ash being secretly part of the Elite Four. It really depends on how the author interprets the concept and what kind of story they want to build around it.

One possible fanfiction could be about Ash finally facing the Elite Four after a long journey of training. He might have new and powerful Pokémon by his side, and the battles could be intense. For example, his Pikachu could have evolved into a new form, giving him an edge against the Elite Four's strong Pokémon.

A plotline could be that Keith is an undercover agent or spy, and being a girl would put her at risk in her mission. So she pretends to be a boy. As the fanfiction unfolds, she has to balance her real self and her false identity while also dealing with the challenges of her mission and the people she meets during it.

He might face some tough battles right away. The Elite Four are known for their strong Pokémon and strategic skills. Ash would have to quickly adapt to their level of play.

Ash is the central figure. The Elite Four members, whose names may vary depending on the region in the Pokemon world, are also main characters. His friends, like Brock or Misty, might also make appearances to support him, even if they're not directly in the battles.

Well, it could be about Ash having various battles and adventures against the Elite Four. Maybe he's trying to prove himself, or it could involve some unique Pokemon he uses in these encounters.

In this fanfiction, Ash might face some unexpected challenges before even reaching the Elite Four. Perhaps there are villains who try to stop him from getting to the Elite Four battles. This adds an extra layer of excitement and adventure to the story. Ash would then have to overcome these obstacles while also preparing for the tough battles ahead with the Elite Four.

One possible plotline could be that Naruto has been hiding his blindness all along to protect his friends. He might have developed special techniques to compensate for his lack of sight, like relying more on his other senses such as smell and hearing. For example, he could use his sense of smell to detect enemies' movements and positions, similar to how he uses it to find Sasuke in the original series. Another idea is that his blindness is a result of some hidden power or curse, and as the story unfolds, he has to find a way to either overcome it or use it to his advantage.

One possible plotline could be that Naruto discovers a hidden vampire world while on a mission. Maybe he stumbles upon a vampire lair and has to figure out how to deal with these new, powerful creatures. He could be intrigued by their powers and try to learn from them while also keeping his own ninja village safe from any vampire threats.

One plotline could be that they secretly married to protect Ginny from a dark wizard who has a vendetta against Harry. By being secretly married, they think they can keep Ginny out of harm's way. Another could be that they did it on a whim during a romantic getaway and then decide to keep it a secret just for a while to enjoy their private time together.