When his mother earns a vacation to the islands, Pokémon trainer Satoshi and his companion Pikachu set out for Melemele Island in Alola, an area filled with Pokémon and familiar ones that have evolved into new forms.
Eager to explore every corner of the island, Satoshi and Pikachu sprint ahead with excitement, only to quickly lose their bearings while chasing a Pokémon that darts between foliage.
Their adventurous pursuit eventually leads them to the Pokémon School, an institution where aspiring trainers gather to deepen their understanding of these creatures.
During their time at the school, a confrontation occurs when he and a studious student—the pragmatic Kaki—encounter the members of Team Skull, during which Satoshi uncovers the power of the Z‑Moves that originate from Alola and demand perfect synchronization between trainer and Pokémon.
That night, as the island settles into dusk, he and Pikachu encounter the deity Pokémon of Melemele Island, the enigmatic Kapu Kokeko, who watches over the land with wisdom.
The legendary Pokémon bestows upon them a Z‑Ring, an artifact that unlocks the ability to channel and perform the formidable Z‑Moves.
Overwhelmed by the earlier encounter and now equipped with a powerful Z‑Ring, Satoshi and Pikachu resolve to remain in Alola, dedicating themselves to mastering the strength of these new attacks.
Upon enrolling at the Pokémon School, Satoshi joins a cohort of classmates, including Lillie—who holds affection for Pokémon yet feels hesitant to physically touch them—the Kaki, and many others eager to learn.
While balancing coursework, they must repel the troublesome Team Rocket—who have arrived in Alola to further their ambitions—and tackle the Island Challenge, a series of trials essential for honing mastery over Z‑Moves; together, Satoshi and Pikachu embark on a new chapter of adventure.