A passionate trainer who never gives up. He considers Pokémon family rather than just friends and stays with them until the end no matter what difficulties arise. A skilled trainer who became the first Alola Champion through creative battling and strong mental fortitude. Pokémon Pikachu (Electric): Ash's eternal partner. He is deeply loyal and bravely faces any opponent. Rowlet (Grass/Flying): Relaxed and sleepy, but possesses excellent focus at critical moments. Incineroar (Fire/Dark): Initially very wary, but grew into a powerful ace after learning to trust Ash. Rockruff → Lycanroc (Dusk Form) (Rock): Active and competitive, showing perfect chemistry with Ash. Poipole → Naganadel (Poison → Poison/Dragon): Mischievous but loves Ash dearly; evolved after returning to Ultra Space. Meltan → Melmetal (Steel): Has a curious and pure personality; evolved during the Alola League finals.

Usually quiet and calm, but more serious than anyone in battle. She loves Water-type Pokémon and possesses excellent fishing and swimming skills. Pokémon Primarina (Water/Fairy): Her representative partner who grew alongside her. It uses beautiful songs and powerful Water-type moves.

A passionate and responsible trainer. He treasures his family and Pokémon, and handles Fire-type Pokémon better than anyone. Pokémon Turtonator (Fire/Dragon): Kiawe's main Pokémon with tough endurance and powerful firepower. Marowak (Alolan Form) (Fire/Ghost): A calm and reliable partner whose specialty is attacking with a flaming bone. Charizard (Fire/Flying): A Ride Pokémon Kiawe uses for travel, playing a major role in both transportation and battle.

An aspiring chef with a bright and positive personality. She helps out at Aina's Kitchen, run by her family, and researches Pokémon cuisine. She shares a deep bond with Grass-type Pokémon. Pokémon Tsareena (Grass): Cute and kind, but grows into a strong and reliable partner as it evolves. Shaymin (Grass): A Mythical Pokémon she briefly cared for, creating special memories with Mallow.

Character Kind and considerate, but was initially afraid of touching Pokémon. She grows strong by overcoming her fears through her journey. She calls Gladion her older brother. Pokémon Vulpix (Alolan Form) (Ice): A partner Lillie raised dearly from an egg. It is very affectionate and follows Lillie well.

A calm and smart inventor. He likes Electric-type Pokémon and helps his friends through machines and inventions. He possesses great analytical skills and conducts calm battles. Pokémon Togedemaru (Electric/Steel): Sophocles' first partner. It is affectionate and can be jealous, but follows Sophocles more than anyone. Vikavolt (Bug/Electric): Has a relaxed personality, but uses fast and powerful Electric moves after evolving.

The Pokémon Professor of the Alola region and the teacher at the Pokémon School. Usually kind and cheerful, he is a highly skilled trainer who also active as the masked 'Masked Royal' in battles. He is the founder of the Alola Pokémon League. Pokémon Lycanroc (Midnight Form) (Rock): Professor Kukui's representative partner. It overwhelms opponents with calm yet powerful attacks. Braviary (Normal/Flying): Boasts excellent mobility while flying freely through the sky. Rowlet → Dartrix → Decidueye (Grass/Flying → Grass/Flying → Grass/Ghost): An archer Pokémon with a calm and cool-headed personality. Litten → Torracat → Incineroar (Fire → Fire → Fire/Dark): A Fire-type Pokémon with great strength and competitive spirit.

A living Pokémon Pokedex traveling with Ash. It can talk and think, taking on the role of analyzing and recording Pokémon information. Its curiosity and talkative nature make the journey more enjoyable. It ends every sentence with '-zzt!' (or 'roto!').

A professor specializing in Ultra Wormholes and dimensional research, and Professor Kukui's wife. With a calm and kind personality, she cares for Ash and his friends like her own children. Pokémon Munchlax (Normal): A reliable partner Pokémon that is relaxed and gluttonous but follows Professor Burnet very well.

Gladion: Usually a man of few words who appears cold, but treasures his family more than anyone. He shows a strong competitive spirit and excellent skills in battle. Lillie's older brother. Pokémon Silvally (Normal): Gladion's representative partner. It overwhelms opponents with powerful strength by changing into various types. Umbreon (Dark): A Pokémon with high defense and agility. It engages in strategic battles with excellent coordination with Gladion. Lycanroc (Midnight Form) (Rock): Possesses strong attack power and wild ferocity. It pushes opponents back with fast and powerful techniques.