Some fanfictions might include other Pokemon Rangers as important characters. These rangers could be original creations or based on minor characters from the Pokemon anime. They would interact with Ash, sometimes as mentors or sometimes as comrades on a mission.
Obviously, Ash is a common character. His friends like Brock and Misty might also make appearances. They could offer their own skills and knowledge to help Ash in his ranger adventures.
Ash is of course a very common character as he is the central figure. Pikachu is also often included as it is Ash's most well - known Pokémon. Other characters like Misty and Brock might also make appearances as they are Ash's friends and travel companions in the original Pokémon series.
Often, other Pokemon Rangers are paired with Kate. They can work together on missions, like Jack, who might be an experienced Ranger that Kate looks up to. Sometimes, there are young trainee Rangers that Kate mentors, like Lisa. They could go on adventures together, with Kate teaching Lisa about the ropes of being a Ranger.
Some fanfictions might also include new characters that Ash meets on his return journey. These could be trainers with unique Pokemon or mysterious characters who have a connection to the events that led to Ash's return. For example, a young trainer who idolizes Ash and wants to learn from him, or a character who has information about a powerful Pokemon that Ash is interested in.
Ash is obviously a very common character as the title includes his name. Pikachu, his trusty partner, is also likely to be there. His friends like Brock and Misty often appear as well. They might support Ash during his league journey or have their own sub - plots related to the league.
Obviously, Ash is a central character. Pikachu is also often there, as it's Ash's main Pokemon. Misty and Brock might be in the fanfiction too, trying to figure out what has happened to Ash and how to stop his evil ways. Sometimes, Gary Oak could be involved, either as an antagonist to Ash's new evil self or as someone trying to help bring him back to the good side.
Some fanfictions might show Ash becoming a sort of honorary Pokemon Ranger. He would then have to balance his duties as a Trainer and as a Ranger. This could create internal conflict for him as he tries to decide which role is more important at different times. His friends from the Pokemon journey, like Brock and Misty, could also be involved, adding more layers to the story.
Gary could be a common character in such fanfiction. Since he's Ash's long - time rival, it makes sense for him to show up at the Battle Tree. He might be there to test his skills against Ash or to prove himself as a better trainer.
Professor Kukui is another common character. He serves as a guide and mentor to Ash in the Alola region. He might provide Ash with new Pokémon knowledge, especially about the unique Alola Pokémon species. And of course, there are the various Pokémon trainers that Ash meets and battles in the Alola region. These trainers can range from novice trainers just starting out to more experienced ones who pose a real challenge to Ash.
Some of the more powerful or rare Pokemon also tend to be popular characters in Pokemon Ranger fanfiction. Their presence can add an element of excitement and mystery to the story. For instance, a Legendary Pokemon that the Ranger has to somehow interact with or protect.
A theme of environmental protection is also quite prevalent. Rangers are often associated with protecting nature and Pokémon habitats. So in 'Ash as a Ranger' fanfictions, Ash is usually involved in efforts to stop villains from polluting or destroying natural areas. He might have to battle against teams that are after rare Pokémon in these habitats, which ties into the theme of conservation. This can be seen in many fanfictions where Ash has to use his ranger skills to safeguard a particular area.