Obviously, Ash is one of the main characters. He's the central figure through which the story unfolds in the Pokemon universe. His determination and love for Pokemon are likely to be important aspects of his character in this fanfiction as well.
There could be new characters introduced as well, like an anthro - like Eevee that becomes Ash's friend or a rival trainer who specializes in anthro Pokemon. These new characters would bring in fresh dynamics and storylines, adding more depth and variety to the fanfiction.
One interesting plot could be Ash forming a unique bond with an anthro - like Pikachu that has more human - like emotions and intelligence. They might go on a journey where they face challenges not just in battles but also in understanding the new social dynamics of the anthro Pokemon world.
The Pokemon characters, when made anthro, can be developed by giving them human - like traits. For example, Pikachu as an anthro could have a love for certain human foods, or a fear of heights which is a very human - like phobia. Their relationships with Ash could also change, becoming more like friendships between equals rather than just trainer - Pokemon relationships.
The setting also plays a big role. Sometimes the fanfiction takes place in a new region or a different version of the Pokemon world. This new setting can introduce new rules or challenges related to the anthro Pokemon. Like, there could be areas where only anthro Pokemon are allowed, and Ash has to find a way to enter. Another important element is the character development of both Ash and the anthro Pokemon. They might learn new skills or gain new perspectives through their interactions.
Since it's an 'ash the pokemon fanfiction', Ash is the central figure. But it could also feature his friends from the original series like Misty and Brock. And of course, the villains he encounters would be important characters too. There may be new characters created by the fanfiction writer, such as a mysterious trainer who has a rare and powerful Pokemon that Ash has to face.
The villains in the fanfiction can also be considered main characters in a sense. They might be after the power of the legendary Pokemon. There could be a team of bad guys who are trying to capture and control a Groudon or a Kyogre to cause chaos in the Pokemon world, and Ash has to stop them. Their actions and plans create the conflict that Ash has to overcome in the story.
Obviously, Ash is one of the main characters. Since it's about him being a legendary Pokemon in this fanfiction, he's central to the story.
Their relationship can develop through shared experiences in battles. For instance, when they face a tough opponent together, they start to trust each other more. Ash might learn to rely on Anthro Suicune's unique abilities, like its ability to sense danger from afar.
One idea could be Ash turning into an anthro Pokemon himself and having to learn to adapt to this new form while still trying to pursue his Pokemon training goals. He could face discrimination from some humans who fear the new anthro Pokemon but find acceptance among his friends and other Pokemon.
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.
A new character could also be introduced as a love interest. For instance, a mysterious trainer from a far - off land who is intrigued by Ash's unique bond with his Pokemon. They meet during a big Pokemon tournament and start to develop feelings as they compete against and support each other during the event.