Obviously, Ash would be one of the main characters. His Pikachu would also be there as his constant companion. Serena might also be a main character as she has a connection to Ash and is from Kalos.
Ash is the central figure for sure. Then there could be his Kalos - region friends like Clemont and Bonnie. They might play important roles in helping Ash during his return. Also, some of the gym leaders or elite four members from Kalos could be main characters as they could be involved in battles or quests with Ash.
Ash is the main character without a doubt. His Pokemon team, including Pikachu, Greninja (if he still has a connection with it in the fanfiction), would be important. In addition, new characters could be introduced. Maybe a young trainer who idolizes Ash and joins him on his return journey to Kalos. And of course, the villains or antagonists in the Kalos region, like Team Flare (if they make a comeback in the story), could also be main characters in the sense that they create obstacles for Ash.
In the 'smart ash in kalos fanfiction', Ash is surely one of the main characters as the title implies. His Pokémon, like Pikachu, Greninja, etc., would also be important characters. And perhaps some of the friends he makes in the Kalos region, like Serena, Clemont, and Bonnie, would be main characters as well. They could interact with this'smart Ash' in different ways, with Serena maybe being attracted to his newfound intelligence or Clemont being impressed and wanting to learn from him.
Obviously, Ash would be one of the main characters. There might also be his Pokémon like Pikachu. And he could meet new friends in Kalos like Serena, who often accompanies Ash in the official Kalos storyline.
Well, obviously Ash is one of the main characters. His Pokémon are also key characters in these fanfictions. They are the ones that show his strength through battles.
Well, it could be about Ash going back to Kalos to compete in some new Pokemon battles. Maybe he wants to challenge new trainers or participate in a special tournament there.
He might meet Serena again. Since he has been to Alola and now travels to Kalos, their reunion could be an interesting plot point.
The main characters are Ash and Red. Ash, who has been traveling through different regions in the Pokémon world, and Red, who has his own legend in the Pokémon games. In a Kalos - themed fanfiction, they will be the ones driving the story forward. They may encounter other trainers, Gym Leaders, or even Team Flare members, but it's their actions and decisions that will shape the narrative.
Serena is often included. Her relationship with Ash, whether it's a budding romance or just a strong friendship, can add a lot of depth to the fanfiction. She can be shown cheering Ash on during his Kalos League battles or even helping him strategize.
The main characters would surely include Ash. In the context of Kalos, his Pokémon like Pikachu are also key characters. Additionally, Serena, who has a special relationship with Ash during his Kalos adventure, is likely to be a main character. And there could be other trainers or characters that Ash interacts with in Kalos, such as Clemont and Bonnie, who might play important roles as well.
Serena could be one of the main characters in the harem. She has a close relationship with Ash already in the original series. Also, Miette might be included as she showed interest in Ash. And Shauna could also be part of it as she was always friendly towards Ash during his Kalos journey.
Obviously, Ash and Greninja are the main characters. Ash, the trainer with a big heart and a lot of determination. Greninja, the powerful and unique Pokémon with its cool design and amazing abilities.