Maybe an old and wise sea - Pokemon researcher. He has spent his whole life studying the sea - Pokemon and their behaviors. When signs of a new 'pokemon king of the sea' start to appear, he gets involved in the events. He uses his knowledge to guide the young trainers and Pokemon in dealing with this potential new power in the sea, all while having his own past experiences and secrets that are gradually revealed throughout the fanfiction.
A young and ambitious water - type Pokemon trainer could be the main character. He or she has a deep connection with sea - Pokemon and dreams of seeing a true king of the sea emerge.
It could be a unique sea - Pokemon itself. For example, a Lapras with extraordinary powers and intelligence. This Lapras has the ambition to rule the sea in a just and peaceful way, and the story could be about its journey to become the recognized king. It would have to face rivals, make friends, and deal with the changing environment of the sea.
Ash is definitely one of the main characters since he is in the title as the 'king of the sea'. There might also be his usual Pokemon companions like Pikachu. And it's possible that some water - type Pokemon, such as Squirtle or Gyarados, could play important roles as they are associated with the sea.
It could be about a powerful water - type Pokemon rising to become the undisputed king of the sea. Maybe it has to face various challenges from other sea - dwelling Pokemon and trainers who want to control the seas.
The main character could be a scientist who has been studying Pokemon and their habitats. They discover some unusual data that points to the existence of a powerful Pokemon that can safeguard the land and sea. Driven by their passion for knowledge and the well - being of the ecosystem, they set out to find this Pokemon and end up becoming the central figure in the story. They would use their scientific knowledge to understand the Pokemon better and to come up with strategies to protect it and the environment it is meant to safeguard.
A young and determined trainer could be the main character. This trainer has a deep connection with nature and a strong sense of justice, which drives them to protect the land and sea.
It could be a scientist who is involved in the study of Pokemon genetics. While trying to understand the mechanics of evolution better, they accidentally stumble upon the new evolution and then become involved in the events that unfold as a result, both in the scientific and the trainer communities.
It could also be an experienced pokemon trainer who has seen a lot in their travels. After encountering a mirage pokemon by accident and realizing how different and powerful they are, they become determined to become the mastermind in the world of mirage pokemon. They use their existing pokemon training skills and knowledge to study these special pokemon, making them a formidable force in the fanfiction.
The main character could be a talented pokemon stylist. They have a passion for making pokemon look their best with unique haircuts. They travel around different regions to learn new haircut techniques and to show off their skills on various pokemon.
It could be Ash. He's the classic Pokemon protagonist and has been through so many trials already. His will has been tested countless times, like when he faced the Elite Four or when he had to rescue his Pokemon from Team Rocket. In this fanfiction, he could face a new kind of test that really pushes his will to the limit.
A Pikachu could be a great main character. Pikachu is popular and has a lot of potential for character growth. It could start as a timid Pokemon but become a strong leader during the uprising.
Squirtle. Squirtle is cute and friendly. If it adopted a human child, it could show the child the underwater world of Pokemon. The Squirtle could teach the child how to swim, and they could explore underwater caves together. It would be a really fun and light - hearted story with Squirtle as the main Pokemon.